"I Could Have Danced All Night" is a song from the musical My Fair Lady, with music written by Frederick Loewe and lyrics by Alan Jay Lerner, published in 1956. The song is sung by the play's heroine, Eliza Doolittle, expressing her exhilaration and excitement after an impromptu dance with her tutor Henry Higgins.

It was first performed by Julie Andrews, in the original Broadway production of My Fair Lady. In the 1964 film adaptation of the musical, the song was sung by Marni Nixon, dubbing the singing voice of Eliza Doolittle (who was played by Audrey Hepburn).

Hit versions of the song were recorded by Sylvia Syms, Dinah Shore, Frank Sinatra, and Jamie Cullum. It was featured in The Birdcage sung by Nathan Lane, Hank Azaria, Gene Hackman, Robin Williams andDianne Wiest. Many actresses have also sung the song in the stage version of the musical including Martine McCutcheon, Laura Michelle Kelly, Amy Nuttall and Lisa O'Hare.