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

After a pre-Broadway tryout in San Francisco, California, the musical opened on Broadway on April 29, 2007 to mostly positive reviews. The musical was recorded for MTV in September 2007 and aired in October 2007.

A United States first national touring production is currently in production.

Legally Blonde played its final performance on Broadway on October 19, 2008.