Justin Theroux (born August 10, 1971) is an American actor, director, and screenwriter.
Theroux was born in Washington, D.C. He graduated from The Field School. His mother, Phyllis (née Grissim), is a journalist and author, and his father, Eugene Theroux, is a corporate lawyer of French Canadian descent. Justin Theroux is the nephew of the travel writer and novelist Paul Theroux, novelist and poet Alexander Theroux, and novelist and educator Joseph Theroux; he is the cousin of British journalists and documentary film makers Louis Theroux and Marcel Theroux.
Theroux made his film debut in 1996, in Mary Harron's I Shot Andy Warhol. Since then, he has performed both on Broadway, starring in Observe the Sons of Ulster Marching Towards the Somme; in numerous off-Broadway productions; and in comedy films such as Charlie's Angels: Full Throttle, The Baxter, Romy and Michelle's High School Reunion, Broken Hearts Club, and Zoolander. He has also performed in more serious films such as American Psycho. He appeared in the film versions of the cult television shows Strangers With Candy and Michael Mann's Miami Vice. Theroux starred in David Lynch's films Inland Empire and Mulholland Drive.