Jeremy Piven is an American actor and producer. He is best known for his role as Ari Gold in HBO's 2004-2011 comedy series, Entourage. From 2013, he has starred as the title character of the British television period drama, Mr Selfridge. In the 1990's, he had supporting roles in The Larry Sanders Show and Ellen. He was also the voice of Elongated Man in Justice League Unlimited.