"One Hand, One Heart" is a song from the musical West Side Story by Leonard Bernstein and Stephen Sondheim. It is a duet sung between Maria and Tony while they have a make-believe wedding, as seen in the stage version and 1961 film, while in the 2021 film, they sing it as they pledge their love to one another inside a church at The Cloisters as part of their date. Larry Kert and Carol Lawrence introduced it in the 1957 Broadway production.