Models who become actresses—there are quite a lot of them. Fewer who can really act. Looks and talent are two very different things, but when they sync up, you get a Hollywood star.

Cara Delevingne attends the red carpet arrivals of "The Face of an Angel" during the 58th BFI London Film Festival at Odeon West End in London on Oct. 18, 2014. John Phillips/Getty Images for BFI