"If I Could Be with You (One Hour Tonight)" is a popular song. The music was written by James P. Johnson, the lyrics by Henry Creamer. The song was published in 1926 and first recorded by Clarence Williams' Blue Five with vocalist Eva Taylor in 1927. It was popularized by the 1930 recording by McKinney's Cotton Pickers, who used it as their theme song. This song was whistled and sometimes sung (partially) on a few occasions by Jack Lemmon as "Ensign Pulver" (to himself) during the 1955 film Mister Roberts.