The 'When Harry Met Sally...' soundtrack album features American singer and pianist Harry Connick Jr.

Bobby Colomby, the drummer for Blood, Sweat & Tears, was a friend of Reiner's and recommended Harry Connick Jr., giving the director a tape of the musician's music. Reiner was struck by Connick's voice and how he sounded like a young Frank Sinatra.

The movie's soundtrack album was first released by Columbia Records in July 1989. The soundtrack consists of standards performed by Harry Connick Jr. with a big band and orchestra arranged by Marc Shaiman.