Cats is a musical. It is based on Old Possum's Book of Practical Cats, a book of poems by T.S. Eliot. Trevor Nunn wrote the lyrics for the song, "Memory", which is based on some of T.S Eliot's poems. Andrew Lloyd Webber wrote the music.

Cats premiered at the New London Theatre in the West End on 11 May 1981. It closed on 11 May 2002 after 8,949 performances. It opened on Broadway on 7 October 1982 at the Winter Garden Theatre. It closed on 10 September 2000, after 7,485 performances.

The musical won the 1982 Laurence Olivier Award for Best New Musical and the 1983 Tony Award for Best Musical.