Mathew Perry plays a family man whose life is turned to disarray when he finds that he's mysteriously reverted back to the age of 17 (in the form of High School Musical's Zac Efron) in this New Line Cinema comedy. Hijinks ensue as the teen enlists in the same school as his children so that he can keep an eye on them. Knocked Up's Leslie Mann co-stars in the Burr Steers' helmed production, written by Jason Filardi (Bringing Down the House). ~ Jeremy Wheeler, All Movie Guide