"That's All There Is to That" is a song written by Clyde Otis and Kelly Owens and performed by Nat King Cole featuring The Four Knights. It reached #15 on the U.S. R&B chart and #16 on the U.S. pop chart in 1956. The song reference's Ethel Barrymore's phrase to rebuff curtain calls, "That's all there is, there isn't any more".
The single's B-side, "My Dream Sonata" reached #59 on the U.S. pop chart in 1956.