Viggo Peter Mortensen, Jr. (born October 20, 1958) is a Golden Globe- and Academy Award-nominated American theater and movie actor, poet, musician, photographer and painter.

He is perhaps best known for his roles as Aragorn in Peter Jackson's The Lord of the Rings film trilogy, Frank T. Hopkins in Hidalgo, David Shaw in A Perfect Murder, Tom Stall in David Cronenberg's A History of Violence and his Academy Award nominated role as Nikolai Luzhin in Cronenberg's Eastern Promises.

He is to star in the upcoming film adaptation of Cormac McCarthy's novel The Road, as "The Man".