WINNING TRIO: For Michael Rider’s debut collection at Celine, the French brand shut down the street in front of its headquarters.

While editors negotiated the security checkpoint, Kim Taehyung, aka V of K-pop band BTS, sailed up on a bicycle for his first official event since completing military service last month.

Having arrived early, he whiled away the time by watching guests arrive through a window overlooking the cobblestoned courtyard of the 17th-century mansion known as Hôtel Colbert de Torcy.

By the time he was joined by his longtime friend and fellow Celine ambassador Park Bo-gum and singer Suzy Bae, a veritable scrum had formed around the front row guests.

“Oh la la,” exclaimed Naomi Watts, as she dodged a server carrying a silver platter. The actress and Stripes Beauty founder wore Celine while promoting her book “Dare I Say It: Everything I Wish I’d Known About Menopause,” and has been toting the label’s Antoinette bag.

“I love everything about this brand, and it’s super exciting for Michael too,” said Watts, who donned an oversized black leather jacket over her gingham shirt dress. “Always a good way to go in my book: a little bit of classic, a little bit of modern and, yeah, a bit of androg’.”

Emily Hampshire was enjoying her first Paris Fashion Week. “You can tell it’s my first: I left my bag open, and that’s supposedly wrong to do,” she joked, after a fellow guest pointed out her 16 bag was not clasped shut.

Hampshire came with her “Schitt’s Creek” costar Dan Levy, who does double duty as her stylist. “He is a kind of style connoisseur, so I usually call him and send him lots of pictures of what I’m deciding on, and then he pares it down,” she revealed. 

It was Levy who introduced the Canadian actress to Rider, but even she had no idea what was about to come down the runway. “I’m just as in the dark as everybody, which is exciting. You rarely get to see something that you know nothing about,” she said. 

Hampshire noted the designer likes to keep a low profile. “You can’t find him on the internet, and there’s not many people you can’t find on the internet. He’s so private, and so this is really exciting to see the secret let out of the bag here,” Hampshire said.

Fresh off the release of “Bonjour Tristesse,” Lily McInerny was getting ready to go back on set. “It’s actually the first time I’ve worked in New York, even though I was born and raised there, so I’m really looking forward to shooting there,” she said.

She’s familiar with Rider’s work at Ralph Lauren. “I’m excited to see what sensibilities from there carry over. And I also understand that he worked with Phoebe Philo in the years of Phoebe Philo’s Celine, so I’m really excited to see if there’s any references to that era of Celine and a return to that style,” the 26-year-old actress said.

Rising star Théodore Pellerin, who played Karl Lagerfeld’s partner Jacques de Bascher in “Becoming Karl Lagerfeld,” enjoys dipping into fashion. “I like designers, I like what people can do with clothes and for an actor, obviously, clothes are very important,” he said.

The Canadian actor is gearing up for the release of two movies in which he plays the lead roles.

“Lurker,” the feature directorial debut for “The Bear” and “Beef” writer Alex Russell, premiered at Sundance and the Berlin Film Festival. The story of a young retail worker who befriends a music celebrity, it will hit U.S. screens at the end of August.

That will be followed in September by “Nino,” for which he won the Louis Roederer Foundation Rising Star Award during the Critics’ Week sidebar at the Cannes Film Festival.

“It’s the story of a young man who is unexpectedly diagnosed with cancer, and we follow him for three days before his first treatment. He locks himself out of his home and he kind of gets swallowed up by the city and the people he meets,” Pellerin explained. 

“The character is kind of forced to confront his mortality in a new way, but it’s ultimately a process that brings him back to life,” he said.

Also in attendance were Alanis Morissette, fresh off her performance at the Glastonbury Festival; Kristen Wiig; Dev Hynes; Hannah Einbinder; Jerrod Carmichael, and fellow designers Jonathan Anderson, Raf Simons, and Lucie and Luke Meier, among others.