It's time to get'cha head in the game because the High School Musical cast is reuniting for the 10th anniversary of the Disney Channel original movie classic. Stars Vanessa Hudgens, Lucas Grabeel, Corbin Bleu, Ashley Tisdale and Monique Coleman all got together to film nostalgic segments that will air on Wednesday, Jan. 20 during a special rebroadcast of the film. Zac Efron wasn't able to make it due to scheduling conflicts but filmed a special pre-recorded message for fans.

"Seeing the cast of High School Musical back together again reaffirms what made it special 10 years ago. It's their optimism, their dedication and their extraordinary talent — as a group — that made this such an exceptional movie and cultural phenomenon," Disney Channel President Gary Marsh said in a statement. "Ten years later, the movie continues to delight audiences around the globe, not just for its memorable song and dance numbers, but for its universal themes that continue to resonate with fans everywhere — express yourself, believe in yourself and always follow your dreams."

This impromptu High School Muscial reunion pic warms our hearts

High School Musical became the highest-rated broadcast ever for the Disney Channel when it premiered a decade ago. It became a worldwide phenomenon, reaching 100 million unduplicated viewers around the world by the end of the year. The soundtrack - which featured fan-favorites like "Breaking Free," "Bop to the Top" and "We're All in This Together" - became the best selling album of 2006.

It also launched the careers of its main stars. Efron is now a Hollywood A-list stud while Hudgens will show off her musical chops again as Rizzo in Fox's Grease: Live later this month. Gabreel is a regular on Freeform's Switched at Birth while Tisdale has moved behind the camera to executive-produce the network's Young & Hungry, starring Emily Osment. Bleu also had resurgence in popularity when he came in second place on Season 17 of Dancing with the Stars.

High School Musical 2 followed in 2007 and the feature film High School Musical 3: Senior Year was released in 2008.

The High School Musical reunion airs Wednesday, Jan. 20 at 8/7c on Disney Channel.