Next Gen 2010: Hollywood's Young Guns

At only 20, Johnson is already engaged, a new father to a baby girl and an in-demand import from across the pond. The London-raised actor, who appeared in his first film (Tom & Thomas) at 10, says he never "chose" to become an actor. "I just knew I loved working," he says. Recent gigs have included the underdog-superhero comic book adaptation Kick-Ass. Neither compares to playing an angsty teenage John Lennon in the critically acclaimed Nowhere Boy, a performance Paul McCartney called "brilliant."