Hollywood Reporter Names 25 Most Powerful Stylists List

The London-based Canadian stylist has worked with Knightley for several awards seasons and on the actress’ Chanel ad campaigns; she’s also the editor of British indie fashion magazine Lula, which she founded in 2006.

PHOTOS: Behind the Scenes at THR's 25 Most Powerful Stylists Photoshoot

Clark’s standout moment was when Knightley arrived at the Venice Film Festival for A Dangerous Method’s photocall in a bold and colorful printed silk dress by unknown designer Mary Katrantzou, paired with nude pumps and a sleek bobbed ’do. Suddenly, everyone was asking, “Mary Katran-who?!”

PHOTOS: Best Awards Season Looks by THR's 25 Most Powerful Stylists of 2012

Clark’s trendsetting discovery proved that a stylist’s selection can move product: The “Keira” dress quickly sold out on Net-a-porter.com, and Barneys New York can’t keep Katrantzou spring dresses in stock. Clark’s other noteworthy looks include Knightley’s Valentino Couture golden lace gown in Venice and Melancholia actress Dunst’s paisley bustier dress by Honor at the film’s London premiere. Clark is also working on a Nina Ricci perfume ad and a capsule collection for Wren.