"Werewolves of Lonon" is a song composed by LeRoy Marinell, Waddy Wachtel, and Warren Zevon and performed by Zevon. Included on Zevon's album Excitable Boy, it featured accompaniment by bassist John McVie and drummer Mick Fleetwood of Fleetwood Mac. The title reference is to the first Hollywood motion picture about lycanthropy, entitled Werewolf of London. The song is memorable for its humorous and macabre lyrics, and the refrain featuring a howling "a-ooo!!"