Samuel Henry John Worthington (born 2 August 1976) is an Australian actor. He is best known for playing Jake Sully in Avatar, Marcus Wright in Terminator Salvation, and Perseus in Clash of the Titans as well as its sequel Wrath of the Titans. He then transitioned to more dramatic roles, appearing in The Debt (2010), Everest (2015), Hacksaw Ridge (2016), The Shack (2017), Manhunt: Unabomber (2017), and Fractured (2019). On television, he appeared in his native Australia as Howard in Love My Way and as Phillip Schuler in the television drama mini-series, Deadline Gallipoli, for which he was also an executive producer. He also voiced the protagonist, Captain Alex Mason, in the video games Call of Duty: Black Ops (2010), Call of Duty: Black Ops II (2012), and Call of Duty: Black Ops 4 (2018).