My Fair Lady is a musical based on George Bernard Shaw's 1913 play Pygmalion, with book and lyrics by Alan Jay Lerner and music by Frederick Loewe. The story concerns Eliza Doolittle, a Cockney flower girl who takes speech lessons from professor Henry Higgins, a phonetician, so that she may pass as a lady. The original Broadway and London shows starred Rex Harrison and Julie Andrews.

The musical's 1956 Broadway production was a notable critical and popular success. It set a record for the longest run of any show on Broadway up to that time. It was followed by a hit London production, a popular film version, and many revivals. My Fair Lady has been called "the perfect musical".