The Victoria’s Secret fashion show may be over, but Sydney Sweeney is taking boudoir dressing off the runway and onto the red carpet.

Continuing promotion for Christy, her forthcoming biopic of the boxer Christy Martin, the actor touched down in the United Kingdom for the BFI London Film Festival, where she decided to step out of her comfort zone on the red carpet. Sweeney turned to Seán McGirr to fashion her a custom McQueen gown.

“We wanted to take Sydney in a bit of a new direction for this—something distinct from the more romantic and princess silhouettes she’s often gravitated toward in the past,” Sweeney’s stylist, Molly Dickson, tells Vogue. “What I love most about Sydney is her openness—she’s always game to experiment and evolve. This look was about stepping slightly outside her comfort zone, and McQueen brought that vision to life with such precision and strength.”