Zac and Matthew Turn 17 Again With the Help of Some Friends

Zac Efron continued his run as man of the hour at last night's LA premiere of 17 Again. This time he had some of his friends out to share his moment, including girlfriend Vanessa Hudgens, the Jonas Brothers, costars Leslie Mann, Michelle Trachtenberg and more. Matthew Perry looked fairly youthful himself beside his younger self Efron — see the resemblance? It's been quite the Zac-attack around here these days, but it sounds like you are on board as his acting grows up and enjoyed his SNL gig as he navigates the best way to become a man in Hollywood.

To see more from the premiere including Hunter Parrish, Melora Hardin, Amanda Bynes, Seth Green and others just read more.

Images include: Zac Efron, Vanessa Hudgens, Matthew Perry, Judd Apatow, Hunter Parrish, Melora Hardin, Michelle Trachtenberg, Leslie Mann, Nick Jonas, Joe Jonas, Kevin Jonas, Amanda Bynes, Seth Green