Samuel Stewart Witwer (born October 20, 1977) is an American actor, voice actor, and musician. He is known for playing Crashdown in Battlestar Galactica, Davis Bloome in Smallville, Aidan Waite in Being Human, Mr. Hyde in Once Upon a Time, and Ben Lockwood in Supergirl. He has voiced Starkiller in Star Wars: The Force Unleashed, the Son in Star Wars: The Clone Wars and Emperor Palpatine in Star Wars Rebels. He has voiced Darth Maul in The Clone Wars, Rebels and Solo: A Star Wars Story. In 2019, he joined the cast of Riverdale as Jughead Jones' school teacher Mr. Rupert Chipping. Witwer voiced protagonist Deacon St. John in the PlayStation 4 game Days Gone released in 2019 by SIE Bend Studio.
Witwer was born on October 20, 1977, and grew up in Glenview, Illinois, a small suburb outside of Chicago. He attended Glenbrook South High School, during which time he was involved in drama and theater classes, as well as being the lead singer of a high school band called "Love Plumber". He attended the Juilliard School for a time before moving to Los Angeles.