Flame-haired prince-of-hearts Harry Windsor is touching down in the city today, wrapping up his latest U.S. tour with visits to Harlem and New Jersey, before rounding off the week by captaining a Polo match in Connecticut.

The third in line to the English throne will visit the Tri-State area less than nine months after his  infamous excursion to Las Vegas, when he was pictured engaging in the ancient royal sport of strip billiards.

This time around he’s managed to keep his clothes on, although you’d be forgiven for thinking he hadn’t during an earlier trip to Washington, where he reduced Capitol Hill employees to a group of Twi-Hards.

The polo match scheduled for Wednesday at the Greenwich Polo Club is quickly becoming the hottest ticket in the country.  The event will also be attended by Dan Stevens, otherwise known as Downton’s Matthew Crawley, bringing the hot-guy-with-British-accent-mania to a fever pitch.

The Prince will captain one side of the match, on behalf of Sentebale, a charity he created in order to help children in Lesotho.

But those looking to get a step closer to their Disney dream will be disappointed: the event is invite-only, with guests expected to make a minimum donation of $5,000.

Dan Stevens

After an all-too-brief West Coast jaunt to Palm Springs and La Jolla for spicy juice cleanses and grueling workouts, Shindigger returned to the New York scene just in time for what one exhausted publicist called “official gala week,” which happened to coincide with the social-calendar assault that is the Tribeca Film Festival.

“It’s going to be a schizophrenic monster,” another publicist griped

The mere thought ruined any lingering benefits of Shindigger’s detox. Nonetheless, the highbrow and jam-packed show must go on.

On Monday night, we toasted Mandy Patinkin at the National Dance Institute’s annual gala and sipped Qui libations beside 50 Cent at the Cinema Society’s screening of Pain and Gain. On Tuesday, Shindigger popped over to Pier 60, where we joined Robert F. Kennedy Jr., Mark Ruffalo and Yoko Ono at Riverkeeper’s Annual Fishermen’s Ball cocktail hour. But we couldn’t stop there.

“I’m starting rehearsal for Shakespeare in the Park next week,” actor Jesse Tyler Ferguson told Shindigger inside the Calvin Klein Collection boutique at a cocktail event benefiting the Human Rights Campaign’s “Americans for Marriage Equality” effort. The Modern Family star explained that he and his fiancé, Justin Mikita, were also busy planning the wedding.

“I am getting married in July,” he said. “We’re Californians right now, but we’re doing the wedding in a state where we’re considered an equal and that’s New York.”

Will you be wearing Calvin Klein Collection? Shindigger wondered.

“We just had our tuxedos made by a great designer. Band of Outsiders,” he said.

We milled about the event along with Christine Quinn, Lloyd Blankfein, Uma Thurman, Neil Patrick Harris, David Burtka, Allison Sarofim, Alan Cumming and model Carolyn Murphy, before striking up a conversation with Downton Abbey leading man Dan Stevens.

“Who’s this?” Mr. Stevens said grabbing Shindigger’s three-piece suit.

“Ted Baker and Armani. Are you in Calvin Klein?”

“I am in Calvin Klein tonight,” he laughed. “I’ve been working with them for a little bit, and I’m thrilled that they were behind HRC. I was involved in Human Rights Watch back in London. It’s nice to continue that involvement now that we’re living here.”

The dashing Englishman went on to explain that, since he began acting in Broadway’s The Heiress and filming a new movie in the city, he and his family have settled nicely into life in Brooklyn.

“We’re sort of New Yorkers now,” he said. “It’s very nice to be out with my wife tonight, without the kids, but I’ve been working pretty hard. It’s that type of place.”

Indeed it is.

By Friday, Shindigger was desperate for a poolside nap in Malibu. Alas, we had Bomb Magazine’s 32nd anniversary gala auction to attend at Capitale. There we spotted art world star Kyle DeWoody, who was being honored along with her mother, Beth Rudin DeWoody. Like us, the lanky social bee yearned for a moment to recharge.

“Tomorrow I leave for L.A.,” she said. “But not for relaxation—for work.”

Sigh.

“There’s a lot competing events between the art and the film worlds,” Ms. DeWoody went on, describing how she was trying to navigate her regular VIP agenda with the added wrinkle of Tribeca. The night before, for instance, we had bumped into her at the premiere of Nicholas Wrathall’s Gore Vidal: The United States of Amnesia.

“Nicholas was always talking about this project, and we all thought it was a joke—a made-up thing. It just never came to fruition,” Ms. DeWoody said of the documentary, which seemed especially relevant in these trying times of troubled political leadership and terrorism. “I had no idea what an interesting man Gore Vidal was. I was blown away.”

But not everyone was in an educational mood by week’s end.

It became clear that some of the genteel folk were getting exhausted at Youth America Grand Prix’s “Stars of Today Meet the Stars of Tomorrow” gala, which took place at the David H. Koch Theater, as the commentary from some of the city’s social set had sharpened.

“She holds a grudge worse than an Armenian and a Turk,” sneered one diva in an Oscar de la Renta gown to another doyenne about some other attendee.

Thankfully, at the table of co-chair Heather Georges, decorated by the likes of Darren Henault, Michael Bassett and Adelina Wong Ettelson, things were considerably more upbeat and witty. The coterie was quite impressed by ballerina Svetlana Lunkina, who recently fled the Bolshoi in fear for her life. On this night, to the joy of ballet aficionados, she was dancing for one of the first times since.

But even at our table, the good cheer soon gave way to snippiness.

“Is that Woody Allen?” Shindigger asked.

“Yes! Isn’t his wife Soon-Yi [Previn] on some board?” came a whisper from across the table.

“Why are there so many cameras swarmed around Karen LeFrak?” someone else wanted to know.

“She composed the music for tonight’s program,” another guest replied, unimpressed.

“Well, she does have an M.A. in music history from Hunter,” Shindigger said in her defense.

“She must have had help,” snapped a gentleman to our left with an eye-roll and a snicker.

Thank goodness everyone could retreat to their corners—if not Palm Springs—for the weekend.

Dan Stevens (Getty Images)

Via Vulture, a somewhat spoiler-y report that will trouble anyone rooting for the Matthew-Mary romance on British soap opera (come on, it is a soap opera) Downton Abbey--actor Dan Stevens may leave the show after the beginning of the as-yet-unshot fourth season. Mr. Stevens, the show's romantic lead, appears in the third season (airing stateside early in 2013), but has publicly made noise about wanting to depart the show; he has also recently pursued extracurricular interests, serving as a judge for this year's Booker Prize--a surprisingly demanding duty--and appearing on Broadway in The Heiress.

Dan Stevens and Michelle Dockery of 'Downton Abbey'

Though its hordes of U.S. fans are still waiting for the third season of Downton Abbey to begin airing on PBS, that season ended last night in the UK with 10.1 million viewers, according to Deadline, making it the show's highest-rated season yet for Brit broadcaster ITV.

The third season, costarring Shirley MacLaine, will begin January 6 in the U.S., and it will certainly not be the end of the Downton saga; as with the second season, there's a two-hour movie wrapping up loose ends after the season. And there may be even more, you Grantham gluttons--the Deadline report features creator Julian Fellowes saying he envisions at least a fourth season.

The Masterpiece franchise Downton Abbey has given PBS--perpetually under threat, not least by Presidential candidate Mitt Romney--a new lease on life. Longtime Masterpiece producer Rebecca Eaton, whose work to this point had been widely praised but never in recent memory as widely viewed across America, told The Observer in March that she eagerly awaited more Downton, but "We have to try to keep Julian Fellowes alive—we can’t just work him into the ground."

Dan Stevens in The Heiress.

It was February when we first met up with Dan Stevens. He was standing in a wet, muddy field in Cornwall in southern England, delighting a group of extras with an exaggerated American accent. The actor was between takes on Summer in February, an indie film he was producingand starring in, about a 19th-century English artists’ commune.

Mr. Stevens was tired. He’d been rattling between Cornwall and London while shooting the third season of Downton Abbey (currently airing in the U.K., but not due out here until January), in which he plays the excruciatingly eligible Matthew Crawley, heir apparent to the old English estate. It is his career-defining role, and the breakout success of the show over the past few years has opened a number of doors on both sides of the Atlantic. He says it’s been the most productive period of his life, and the variety of his ventures that is truly impressive.

First there is the Man Booker, Britain’s most prestigious literary prize, which was last week awarded to Hilary Mantel’s sequel Bring Up The Bodies. While appearing on BBC’s The Review Show in 2011, Mr. Stevens launched into a scathing diatribe about the “readability” requirement for that year’s competition winner. A couple of weeks later, he received a phone call from Sir Peter Stothard (this year’s chairman) inviting him to be on the 2012 panel. This was, of course, “a privilege,” he said, but reading 145 novels in seven months, then rereading the longlist and rere-reading the shortlist is quite an “added strain” for someone with a day job. Between almost every take in the new series of Downton, he would force his waythrough a few more paragraphs of literary fiction. The costume department even sewed a Kindle-size pocket into his jacket for efficiency’s sake.

Along with diligently working toward the eventual completion of Summer in February (a seven-year process, so far), he is starring in Vamps, a romantic comedy by Amy Heckerling of Clueless fame, in which he plays Joey Van Helsing (the son of the notorious Dracula character), a young man who falls in love with a bloodsucker, much to the ire of his stake-wielding father, played by Wallace Shawn. “You think everyone is a vampire!” he complains to his dad at one point. The film is due out 24 hours after he makes his full Broadway debut.

Meanwhile, in his free time, Mr. Stevens launched his own online literary quarterly, The Junket, which he put together with a group of Cambridge friends who wanted an outlet for their writing. In his role as editor at large, Mr. Stevens “sharpened his pencil” for only one piece, a witty essay about the boredom of being on safari until you get the taste for blood.

Now he’s here on Broadway, playing the lead in The Heiress, the Tony Award-winning adaptation by Ruth and Augustus Goetz of the Henry James novel Washington Square. It’sa play that periodically returns to town for a limited run of sell-out shows, and this will be no exception. Particularly in light of the caliber of talent in the cast. Oscar-nominated Jessica Chastain and David Strathairn play a wealthy father and daughter, and Mr. Stevens is the canny suitor. (Sound familiar?)

Recently, sitting across the table at Cafe Edison in Midtown, dressed like an English country gent (tweed jacket, white shirt, tweed cap), he seemed invigorated by the challenge.“This feels big,” he said, picking up his coffee with both hands. “Uprooting the family and coming here has been a sort of seismic shift.” He has packed up his house in London and moved everyone—including his 2-month-old son, Aubrey, 2-year-old daughter, Willow, and wife of four years, jazz singer Susie Hariet, who is seven years his senior—across the water. It seems a little drastic for a brief stint on Broadway, but the family was eager to travel.

The quiet, soft-spoken Ms. Hariet had also been in Cornwall for the filming of Summer in February, and was remarkable source of tranquility on the set. It was striking how comfortable the two of them were in what must have been an otherwise complicated situation—what with her husband swiftly becoming a trans-Atlantic heartthrob, and all. Frequently, Ms. Hariet, then pregnant, would stand off to one side with her daughter and watch her spouse perform steamily romantic scenes, one take after another.

Hey, that’s showbiz.

The opportunity to star in The Heiress came along unexpectedly. “We weren’t necessarily thinking of doing a play,” Mr. Stevens recalled over eggs benedict. The first-person plural he casually employs refers to his wider family: a group of agents and PR-types who, over the last few years, have made a series of important decisions about his career’s “direction.” They are a tight, highly professional group of people (who are eager to walk with you through every step of writing a profile of him), only a few of whom are based in the U.K. This may give some idea as to the ambitions of Team Stevens, given that, up until a few months ago, the actor was solely working out of England. It also may give a clue as to whether he’s likely to continue in Downton Abbey, season four—if indeed there is one.

“I think the bar for fulfillment has been raised,” Mr. Stevens said enigmatically when asked about his swiftly evolving professional ambitions. “There’s a certain kind of project I’m looking for now.”

In other words, Perhap$ ...

On Broadway, the role of Morris—opposite Ms. Chastain’s Catherine Sloper—is the sort that comes easily to the 30-year-old actor: wealthy, charming and attractive, but with an egotistical complexity that Mr. Stevens may find more challenging. “It’s a character you really have to get your head around,”he said. And then there’s that 19th-century New York accent.

In recent years, American audiences have embraced a line of British actors who have trained in England and taken the leap from stage to small screen while employing a trim American accent to their advantage. Most notably we’ve seen Hugh Laurie’s House, Dominic West in The Wire and Damian Lewis in Homeland.

These are three names that regularly came up over our breakfast.

“It’s industry legend that no American actor wanted to take it on because House had no redeeming qualities ... which is precisely why a British actor would take it on!” Mr. Stevens said, laughing into his coffee. “But doors are open over here that aren’t necessarily open back home. It’s very heartening to see those sort of guys do well.”

Mr. Stevens said he has always wanted to spend some “serious” time in New York. “It’s such a creative place,” he noted. “It’s frenetic and energetic and can be very confusing. At the same time, if you’re as busy as I am, the city fits around you. I’ve been here at quieter points in my life and I just thought, ‘Wow, these guys move fast,’ and this time I’m like ‘Hmm, yeah, this seems about my pace.’

“It’s a mad, mad city but I’m in a mad place at the minute.”

Mr. Stevens’s rise has been remarkably steady. Adopted at birth, he gained an academic scholarship to a prestigious English academy, where at 13 he landed the role of Macbeth in the school play, beating out children five years older than him for the part. His audition has since been written about by the director, Jonathan Smith, his former teacher, now a friend and the author of Summer in February. Mr. Smith is one of two major figures who have undeniably assisted his ever-inflating career

The other is Sir Peter Hall.

After high school, Mr. Stevens studied English at Cambridge, where he began to shed his “willfully difficult” attitude, and discovered comedy. Performing with the prestigious sketch group the Cambridge Footlights, he also tried stand-up and began venturing to London to entertain rooms of as few as 12 people. “I never aspired to be a stand-up comedian, but I always wanted to try it,” he said. Admittedly, many of his appearancesfell “flat on their face,” but even that, he said, was an experience.

While at Cambridge, Mr. Stevens impressed as Macbeth again, this time alongside Rebecca Hall, the daughter of Sir Peter, a founding member of the Royal Shakespeare Company, who naturally came to watch. The man has seen “the Scottish play” plenty of times; he’s not easily impressed.

Sir Peter Hall subsequently gave Mr. Stevens his first West End debut and his first West End lead, casting him in four productions in total, including Orlando in As You Like It, which eventually transferred to New York. Four years later came Downton. Now, here he is again.

“You have to remember the people to be thankful to along the way,” Mr. Stevens said with signature humility. “But I always maintained a degree of self-belief.”

No doubt that’s getting easier, what with the rapturous reception Downton has enjoyed.

“I remember, we had the staff from Buckingham Palace come and visit the set,” Mr. Stevens recalled. “They serve in the royal household, and they said every Sunday night—I think they all live on the top floor, in the servants’ quarters of Buckingham Palace—they all gather in one room and watch the show. That is astonishing.”

Whether another season of Downton will come to pass is anyone’s guess. He’s a little coy about the subject.

“If I was given the opportunity to work more here, I would take it,” he said, an admission that, while benign, seems guaranteed to chill the blood of Downton fanatics. Then he added, meaningfully, “I think it will all become clear.”

A week after our breakfast, Mr. Stevens emailed as he was returning from London, where he’d just presented Hilary Mantel with her Man Booker prize. He was due back in New York that evening and expected on stage to recommence previews for The Heiress. He was exhausted.

“Last night was momentous,” he wrote. “[I’m] celebrating the end of an extraordinarily challenging few months.”

editorial@observer.com