Famous Actors Who Appeared on Seinfeld Before They Became A-List Stars

Jeremy Piven

Image Source:: NBC/Hulu

Episode: “The Pilot” (Season 4, Episode 23)

Yes…that is Jeremy Piven. We aren’t sure whether he shaved his head (or if he’s really bald), but Piven set out to play Costanza in the famed ‘Pilot’ episode. We have to admit, he looks pretty spot-on in this capacity. As many know, Piven’s breakout role came as explosive super agent Ari Gold in Entourage.