Thomas John Giuliano II, 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, 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.

Steven Universe is an American animated television series created by Rebecca Sugar for Cartoon Network. It tells the coming-of-age story of a young boy, Steven Universe, who lives with the Crystal Gems—magical, mineral-based aliens named Garnet (Estelle), Amethyst, and Pearl —in the fictional town of Beach City. Steven, who is half-Gem, has adventures with his friends and helps the Gems protect the world from their own kind. The pilot was first shown in May 2013, and the series ran for five seasons, from November 2013 to January 2019. The TV film Steven Universe: The Movie was released in September 2019, and an epilogue limited series, Steven Universe Future, ran from December 2019 to March 2020.