Age: 32
Occupation: Film director, writer
Previous TIME 100 Appearances: 0
Reitman's first film, Thank You for Smoking (2005), earned him buzz; his second, Juno (2007), was the darling of critics and audiences alike. His third, the zeitgeisty Up in the Air — starring George Clooney in one of the best performances of his career, as a corporate downsizer with a fetish for flying — snagged six Golden Globe nominations and four Oscar noms. With two career Academy Award nominations for Best Director, the Canadian-born Reitman is one of Hollywood's youngest success stories.