Thomas John Giuliano II (born February 9, 1969), known professionally as Tom Scharpling, is an American comedian, television writer, producer, music video director, voice actor, and radio host. He is best known for hosting the weekly Internet radio call-in comedy program The Best Show with Tom Scharpling (formerly The Best Show on WFMU), the voice of Greg Universe in the animated series Steven Universe and its sequel series Steven Universe Future, and for acting as a writer/executive producer for the TV show Monk.

Scharpling was also a writer on Tom Goes to the Mayor and Tim and Eric Awesome Show, Great Job! Beginning in 1999, he released six albums with comedy partner Jon Wurster under the moniker Scharpling & Wurster.