Terrance McQuewick (Malcolm McDowell) in Entourage

Malcolm McDowell as

Terrance McQuewick

Terrance McQuewick is the owner of the talent agency where Ari was employed during the show’s earlier seasons. Terrance is also the father of Eric’s love interest, Sloan McQuewick. The part is played by Malcolm McDowell, who starred in Stanley Kubrick’s 1971 film A Clockwork Orange.