Sam Witwer

Samuel Stewart Witwer is an actor best known for his voice work of Galen Marek, Darth Vader's secret apprentice in the Star Wars: The Force Unleashed video game and Crashdown in Battlestar Galactica.

Underworld
Heis interested in Star Wars: Underworld, and he wants to reprise as Galen Marek, since he will be in the series. He has hinted that he may be in the show.