Adrian Grenier

The cast of 'Entourage' showed up Wednesday night at Buddha in New York to celebrate the launch of the HBO show's third season. TMZ's cameras caught up with 'Entourage's' Jeremy Piven, Kevin Dillon, Matt Dillon and Adrian Grenier, as well as one of Hollywood's hottest young couples -- Kevin…

Last night Adrian Grenier, Kevin Connolly and Kevin Dillon celebrated the premiere of the new season of their HBO show 'Entourage.' Video Adrian Grenier's 'Entourage' celebrates Paris Hilton and her sister Nicky - who is Connolly's girlfriend - were also on hand for the night's festivities. For…