Zac Efron

Zac Efron arrives at the premiere of Universal Pictures and Illumination Entertainment's 3D-CG "Dr. Seuss' The Lorax" at Citywalk on Feb. 19, 2012, in Universal City, Calif.

Zac Efron attends a meeting with fans to promote "Dr. Seuss' The Lorax" at Corte Ingles store on March 8, 2012, in Madrid.

Taylor Swift and Zac Efron arrive at the premiere of Universal Pictures and Illumination Entertainment's 3D-CG "Dr. Seuss' The Lorax" at Citywalk on Feb. 19, 2012, in Universal City, Calif.

Actors Zac Efron and Michelle Pfeiffer arrive at the premiere of Warner Bros. Pictures' "New Year's Eve" at Grauman's Chinese Theatre on Dec. 5, 2011, in Hollywood, Calif.

From left to right, Alyson Michalka, Zac Efron and Amanda Michalka attend the 2011 People's Choice Awards at Nokia Theatre L.A. Live on Jan. 5, 2011, in Los Angeles.

Zac Efron poses during "Charlie St. Cloud" at Santo Mauro Hotel on Sept. 13, 2010, in Madrid.

Zac Efron attends the premiere for the film "Charlie St.Cloud" during the 36th Deauville American Film Festival on Sept. 11, 2010, in Deauville, France.

Vanessa Hudgens and Zac Efron arrive at the premiere of Universal Pictures' "Charlie St. Cloud" at the Village Theater on July 20, 2010, in Los Angeles.

Zac Efron poses for a portait for the Shining Star Award at the 2010 Maui Film Festival at the Celestial Cinema on June 16, 2010, in Wailea, Hawaii.

Vanessa Hudgens and Zac Efron arrive at the 2010 Vanity Fair Oscar Party hosted by Graydon Carter held at Sunset Tower on March 7, 2010, in West Hollywood, Calif.

Zac Efron poses after recieving the Choice Movie Actor award for "17 Again" in press room during the 2009 Teen Choice Awards held at Gibson Amphitheatre on Aug. 9, 2009, in Universal City, Calif.

Zac Efron arrives at the premiere of Warner Bros. Pictures' "Hangover" at the Chinese Theater on June 2, 2009, in Los Angeles, Calif.

Zac Efron winner of the Best Male Performance award for "High School Musical 3: Senior Year" poses in the press room during the 18th Annual MTV Movie Awards held at the Gibson Amphitheatre on May 31, 2009, in Universal City, Calif.

Zac Efron attends "17 Again" premiere at the Kinepolis cinema on April 28, 2009, in Madrid.

Vanessa Hudgens and Zac Efron attend the Los Angeles Lakers vs Utah Jazz basketball game at the Staples Center on April 19, 2009, in Los Angeles.

Actors Zac Efron and Vanessa Hudgens visit MTV's "TRL" at MTV Studios in Times Square on Oct. 21, 2008, in New York City.

Zac Efron attends the UK premiere of "High School Musical 3" at the Empire cinema, Leicester Square, on Oct. 7, 2008, in London.

Zac Efron poses with his award for Breakthrough Performance in the press room during the 17th annual MTV Movie Awards held at the Gibson Amphitheatre on June 1, 2008, in Universal City, Calif.

Zac Efron arrives to the world premiere of Disney Channel's "High School Musical 2" held at the Downtown Disney District at Disneyland Resort on Aug.14, 2007, in Anaheim, Calif.

From left to right, actors Nikki Blonsky, Zac Efron, director Adam Shankman and actress Amanda Bynes attend the "Hairspray" premiere presented by New Line Cinema at the Ziegfeld Theatre on July 16, 2007, in New York.

Zac Efron, Vanessa Anne Hudgens, Ashley Tisdale and Corbin Bleul pose in the press room at the 2006 Creative Arts Awards held at the Shrine Auditorium on Aug. 19, 2006, in Los Angeles, California. "High School Musical" was honored with the "Outstanding Children's Program" and "'Outstanding Choreography" awards.

Zac Efron attends a photo call for "High School Musical" at the Quay Restaurant on May 26, 2006, in Sydney.

Zac Efron poses backstage after his appearance on MTV "Total Request Live" at MTV Studios Time Square April 26, 2006, in New York.

From left to right, actors Corbin Bleu, Vanessa Anne Hudgens, director Kenny Ortega, and actors Zac Efron and Ashley Tisdale attend a breakfast for the cast and director of "High School Musical" on Dec.16, 2005, at the Four Seasons Hotel in Beverly Hills, Calif.

Zac Efron arrives at The WB Network's 2004 All Star Summer Party at the Pacific Design Center on July 14, 2004, in West Hollywood, Calif.