Samuel Stewart "Sam" Witwer (born October 20, 1977) is an American actor, voice actor and musician.
He is best known for providing the voices of both Emperor Palpatine and Galen Marek/Starkiller (Darth Vader's secret apprentice) in the 2008 video game Star Wars: The Force Unleashed, and the 2010 sequel Star Wars: The Force Unleashed II, both part of the Legends continuity. He reprises his role as Palpatine in Star Wars Rebels.
He also appeared in a episode of Star Trek: Enterprise.
- Star Wars Rebels: The Siege of Lothal - Emperor Palpatine, W1-LE, Imperial Technician
- "Twilight of the Apprentice", "The Holocrons of Fate", "Visions and Voices" and "Twin Suns" - Maul
- "A World Between Worlds" - Son (Uncredited)