Say You'll Be Mine (Christopher Cross song)

"Say You'll Be Mine" is a song by American singer-songwriter Christopher Cross. Released on Warner Bros. Records from his self-titled debut studio album, it was the last single released on March 14, 1981. It features Nicolette Larson on backing vocals. It peaked at No. 20 on the Billboard Hot 100 and No. 15 on the Adult Contemporary chart. It is the shortest song and the opening track from the album, lasting around 2 minutes and 53 seconds.

"Say You'll Be Mine" had multiple B-sides when it was released as a single. For American and Australian issues, use "Spinning" as the B-side, while for Mexican and British issues, use "Poor Shirley" as the B-side for the single.

In 2025, "Say You'll Be Mine" was featured as a bonus track on a compilation album titled Look In My Direction: The Warner Bros. Recordings, which was released posthumously after Nicolette Larson's death.