"Legally Blonde: The Musical" was based on the novel Legally Blonde by Amanda Brown & the 2001 film of the same name.

The plot of Brown's 2001 novel involves Elle Woods, a blonde California University of Los Angeles sorority president. She is deeply in love with her college sweetheart, Warner Huntingdon III. When Warner enrolls in Stanford Law School, he aims to find a girl more serious than Elle to be his bride so Elle schemes a plan to follow him there to win him back. The novel was based on the author's own experiences while she was enrolled at Stanford Law School, with the character of Elle based on herself.