A glance across the room at an awkward Hollywood awards show party first united Zac Efron and Seth Rogen.
"It was kind of a longing look," Rogen said, recalling their first conversation.
"You can't come out and say it, but I was like, 'Dude, I'd ... die to work with you,'" Efron said. "I was kind of imploring him. As a dude growing up in today's world, Seth is someone who I always really related to."
At 32, Rogen has built his career as an actor, writer and producer around an amiable slacker persona in such comedies as "Knocked Up" and "Pineapple Express." At 26, Efron built his as a heartthrob in the Disney Channel's...