Unhappy with how his life has turned out, middle-aged father Mike O'Donnell (Matthew Perry) wishes he could go back and do it all over again. When he attempts to save the life of a mysterious janitor (Brian Doyle-Murray), Mike gets his chance and awakes to discover that he's been transformed into his 17-year-old self (Zac Efron). After convincing his best fried Ned (Thomas Lennon) who he is, Mike sets out recapture his glory days and experience everything he missed out on. But, after becoming his children's high school classmates and visiting his estranged wife, Scarlett (Leslie Mann), Mike realizes that he already had the perfect life and must find a way to change back into an adult. Directed by Burr Steers. With Michelle Trachtenberg, Sterling Knight, Katerina Graham and Nicole Sullivan. Categories: Comedy. Year: 2009.

Zac Efron in 17 Again
With college coming up fast, high school seniors Troy (Zac Efron) and Gabriella (Vanessa Anne Hudgens) begin to realize that they might soon be separated when they head off to different schools. To express their experiences, dreams and concerns for the future, the Wildcats senior class stages an elaborate spring musical. Joining Troy and Gabriella on stage are their friends Sharpay (Ashley Tisdale), Ryan (Lucas Grabeel) and Chad (Corbin Bleu). Directed by Kenny Ortega. With Monique Coleman and Olesya Rulin. Categories: Comedy, Drama, Family, Musical, Romance. Year: 2008.

Zac Efron in High School Musical 3: Senior Year
Directed by Richard Linklater. With Zac Efron, Claire Danes, Christian McKay, Alessandro Giuggioli, Shane James Bordas and Leo Bill. Categories: Drama. Year: 2008.

Zac Efron in Me and Orson Welles
Tracy Turnblad (Nikki Blonsky), an overweight teenager who loves to dance, is obsessed with "The Corny Collins Show," a hit TV dance party. Every day after school, Tracy and her best friend Penny (Amanda Bynes) run home to watch heartthrob Link Larkin (Zac Efron) and the rest of the show's performers shake their stuff. When Corny Collins (James Marsden) holds auditions to replace a star who has left the show, Tracy seizes her chance to make her dream come true, even though her mother Edna (John Travolta) doesn't approve. Directed by Adam Shankman. With Christopher Walken, Michelle Pfeiffer, Queen Latifah, Brittany Snow, Elijah Kelley and Allison Janney. Categories: Comedy, Musical, Dance, Remake. Year: 2007.

Zac Efron in Hairspray