George Raymond Stevenson is a British actor. He is known for playing Dagonet in the film King Arthur (2004) and Titus Pullo in the BBC/HBO television series Rome (2005–2007). He has portrayed two Marvel Comics characters: Frank Castle / The Punisher in Punisher: War Zone and The Super Hero Squad Show, and Volstagg in Thor and its sequels Thor: The Dark World and Thor: Ragnarok. In the 2011 film Kill the Irishman, he portrayed mobster Danny Greene. In 2012, he appeared in the seventh season of Dexter as Isaak Sirko. He also portrayed the character Blackbeard in the third and fourth seasons of Black Sails. He voiced Gar Saxon in Star Wars Rebels from 2016 to 2017 and Star Wars: The Clone Wars in 2020.