Zac Efron is to star in and produce a new comedy.

The 'High School Musical' actor will work on the as-yet-untitled project from the writer of '17 Again', Jason Filardi.

The "workplace" based comedy could be produced by Adam Shankman and Jennifer Gibgot, who are in negotiations to work on the movie, The Hollywood Reporter claims.

'17 Again' - which also starred 'Friends' actor Matthew Perry - grossed $136 million worldwide in 2009, convincing executives to invest in work starring Zac.

This would be one of the first movies worked on by Zac's production company, the newly named Ninjas Runnin' Wild Prods.

Other projects planned include time travel story 'Einstein's Theory' and 'Art of Steal'.

Zac will next be seen in fantasy romance 'Charlie St. Cloud' - which also stars Amanda Crew, Kim Basinger and Dave Franco - will hit US cinemas on July 30, and be released slowly worldwide until the end of the year.