"You're Going to Lose That Girl" is a song by the English rock band the Beatles from their 1965 album and film Help! Credited to the Lennon–McCartney songwriting partnership, the song was mostly written by John Lennon with contributions from Paul McCartney.

Help! is a 1965 British musical comedy-adventure film directed by Richard Lester, starring The Beatles and featuring Leo McKern, Eleanor Bron, Victor Spinetti, John Bluthal, Roy Kinnear and Patrick Cargill. The second film starring the Beatles following Lester's A Hard Day's Night, Help! sees the group struggle to protect Ringo Starr from a sinister eastern cult and a pair of mad scientists, all of whom are obsessed with obtaining a sacrificial ring sent to him by a fan. The soundtrack was released as the band's fifth studio album under the same name.