‘We’re doing highlights from all my collections, redoing the top-selling items in different fabrics and patterns,’ the actress told us on Tuesday night. ‘We still have calls for things from the first season, so now they’ll be available, but only in London at the pop-up.’

Sevigny, in town for a preview screening of new TV show , said the popularity of her Opening Ceremony collection hasn’t changed her view of fashion as an extracurricular pursuit.

‘Fashion is more of a hobby for me,’ she told us. ‘It’s not my career, it’s not really my passion, but it is something I can do with my time that’s lucrative and fun, and I can give something to girls that makes them feel good—something different.’

First and foremost, she’s an actress, and her latest project stands out even amid the daring roles that characterise her career. Sevigny plays Mia, a pre-operative male-to-female transgender contract killer who discovers that she fathered a son with a former partner. Or, in creator Paul Abbott's shorthand, the show is about 'a Glock and a cock.'

It’s a premise as extreme as it is engrossing. ‘I thought it was like nothing I had ever read before. By page two I was ready to sign on,’ Sevigny said.

Filming the six-episode series proved more gruelling than Sevigny anticipated. The project required her to learn an Irish accent (‘really f***ing hard’), live in Manchester for a rainy five-month stretch, and undergo intimate body makeup for the application of her penile prosthesis, a humiliating process that took an hour and a half every day.

‘I cried every time I had to wear it,’ she said. ‘I wasn’t having any sex in Manchester, so I was feeling very unattractive to begin with, and very pent up. Being on set and having the prosthesis—and I always have crushes on all the crew, I have a staring problem, I always stare at everybody—being there in front of them with my breasts and my prosthesis, I felt like a freak, which is the way Mia would have felt. She obviously hates it. She doesn’t want it, she’s just building up the courage and waiting for the right time to go through the surgery, which is a huge endeavour.’

The result—which we see on-screen in the show’s first five minutes—in no way detracts from what Sevigny has called her ‘most feminine, most glamorous role to date.’

If Mia is ‘timeless’ in a ‘70s-inspired, Candy Darling sense, then Sevigny, towering above interviewers in a body-con Versus AW12 dress and stompingly high peep-toe boots, is all modern. Her sense of style has seen her land two ELLE covers, front-row seats at fashion shows (which she says still feel ‘very high school’), and of course, the Opening Ceremony range. But she wavered when asked how she feels about all the attention for her fashion nous.

‘People are looked at under such a magnifying glass that girls are afraid to experiment and be wild,’ she said. ‘I know in England it’s more accepted because it’s a bit more of an eccentric culture, but for the most part, way too much importance is put on what people wear. It scares some people and it makes young girls, I think, have screwed-up aspirations.’

And in case you’re wondering, the perennial fashion crush develops crushes off-set, too.

‘I like Ezra Miller, but he’s only 19—I think that would probably be illegal,’ the 37-year-old said. ‘I saw him at an Occupy Wall Street event a few weeks ago and we locked eyes.... He’s so beautiful that I Google Imaged him, which I hardly ever do. But I was just like, I have to look at images of this boy. He’s so pretty.’

Hit and Miss premieres on Sky Atlantic on 22 May

Click through Chloe's best looks here

Read more about Opening Ceremony's London 2012 plans