"Adeline" is a song by British indie rock band alt-J. It is the sixth track and third single from their third studio album, Relaxer, and was released as a digital single on 24 May 2017 by Infectious Music and Atlantic Records. The song was written by Joe Newman, Gus Unger-Hamilton and Thom Sonny Green and produced by Charlie Andrew. The band adapted a melody from the soundtrack to The Thin Red Line by Hans Zimmer, who is credited on the song as a writer. The band described the song's narrative as "a Tasmanian devil falls in love with a woman as he watches her swim."