Sam Worthington is an actor, who was born in Australia in 1976. He is known well for his role as the lead character in James Cameron's Avatar. More recently, he has voiced the protagonist in Treyarch's Call of Duty: Black Ops. His voice acting for the character of Alex Mason has received mixed opinions. Some gamers feel that his Australian accent shines through too strongly for an Alaskan born character, while others feel that he made an acceptable job of the character's voicing.
He has since continued his relationship with the Call of Duty franchise, by appearing in a number of ads for Call of Duty: Modern Warfare 3 titled “The Vet & The n00b”, in which he co-stars with Jonah Hill.
He reprised the role of Alex Mason in Black Ops II.