Opened at the Palace Theatre on April 29, 2007. Closed October 19, 2008 after 595 performances — 18 months. Legally Blonde is a 2007 musical with music and lyrics by Laurence O'Keefe and Nell Benjamin and a book by Heather Hach. It is based on the novel Legally Blonde by Amanda Brown and the 2001 film of the same name. Wiki link