Leave it to Hector to draw a crowd.

Thom Browne‘s dachshund was rendered in a bright green topiary stationed on 72nd Street, drawing the curiosity of casual passersby. The troupe of people dressed in coordinating seersucker was another clear sign that something was afoot on the Upper East Side block on Wednesday night: the opening of two new Thom Browne boutiques, including a store dedicated to accessories, on Madison Avenue.

Hector himself had dropped by briefly earlier in the day (he’s not big on crowds), but the late afternoon cocktail party had plenty of other VIPs in attendance. Guests included recent Emmy nominees Walton Goggins and Tramell Tillman, who both attended the Met Gala with Thom Browne in May, and Cristin Milioti; Christine Baranski and her “The Gilded Age” costar Louisa Jacobson; “Materialists” director Celine Song, and Jack Innanen.

“I love everyone’s red accents,” said Ella Emhoff, a red handbag slung on her arm, as she took stock of the sartorial theme throughout the room. Everyone, naturally, was dressed in their Thom Browne best, including the man himself.

“ It’s nice to finally be in the neighborhood,” said Browne, holding court throughout the evening. “It’s an idea I’ve had for a long time. I live around here, so it’s just nice to get this store together.”

Coups of Champagne and trays of ice cream — served in Thom Browne-branded cups — were eagerly accepted as guests made their way around the intimate boutique. Goggins, dressed in a blue and white seersucker suit, paused to browse a rack of clothing upon arrival. The “The White Lotus” star had an icy glass of lemonade in hand.

“ I’m not used to carrying a bag,” said Tillman, navigating the top handle accessory that accompanied his Thom Browne pleated skirt and cashmere mesh basketball jersey, layered over a white button-down, as he posed for photos. The actor is firmly Team Thom after attending his first Met Gala with the designer in May. “ It’s very clean, very simple but also elegant — it has a statement, which I truly appreciate,” said Tillman of the designer’s approach.

On Tuesday, the “Severance” actor received his first Emmy nomination, for outstanding supporting actor in a drama series. “ It’s a dream come true and 100 percent honor to be amongst all the nominees,” said Tillman. “And 27 nominations for ‘Severance’ — it’s absolutely incredible.”

“ It’s been very lovely 24 hours,” said Milioti, who also received her first Emmy nomination this week, for her lead role in “The Penguin.” “I’m blown away by the amount of nominations we got. And then also ‘Black Mirror’ got a bunch of nominations — it’s been really great.” The rest of the summer holds “a little bit of work, a little bit of play” for the actress, and then it’s back to Los Angeles for the lead-up to the Emmy Awards in September.

The actress, dressed in a long tailored gray dress, had a front-row seat at Browne’s runway show in New York earlier this year. “ It was like witnessing art — walking, breathing art,” she said. “You feel so fabulous in his clothing. It’s so structured and timeless and classic, while being its own creature.”