William Morrison Charlap (born October 15, 1966, pronounced "Shar-Lap"[1]) is an American jazz pianist and educator.

Stewart was a regular on Perry Como's Kraft Music Hall television series and had a hit recording in 1962 with "My Coloring Book".

In the mid-1990s, he was the musical director of Midnight in the Garden of Good and Evil, A Celebration of Johnny Mercer, part of New York's JVC Jazz Festival.

He and his wife, Canadian jazz pianist Renee Rosnes, released an album of piano duets Double Portrait on Blue Note Records/EMI.

[9] The group plays the music of Blue Note Records from various artists, with arrangements by members of the band and his wife Renee Rosnes.