Legally Blonde is a musical with a book by Heather Hach and music and lyrics by Laurence O'Keefe and Nell Benjamin, based on the Amanda Brown novel and the 2001 film of the same name.

Legally Blonde had its pre Broadway tryout at the Golden Gate Theatre in San Francisco beginning in previews on January 23, 2007. The Broadway production, directed and choreographed by Jerry Mitchell, opened on April 29, 2007 at the Palace Theatre to positive reviews.