What real stars will make appearances on the new season of HBO's hit series "Entourage"? According to the show's creator/executive producer Doug Ellin at last night's "Entourage" party at Ivar Studio, Dennis Hopper just shot an episode this week, M. Night Shyamalan will make an appearance and Gary Busey is coming back.

Ellin also revealed that viewers will finally get to see whether Johnny Drama (Kevin Dillon) and his baby brother Vince (Adrian Grenier) can actually act. Drama lands a role in "Five Towns."  "You'll get to see Vince on a big movie production," adds Ellin. "Everyone's been wondering if he can act and this season we're gonna see that." But what will Vince's big movie be?

In the first two episodes shown last night at the Arclight, Vince is offered a role in an adaptation of an Edith Wharton novel directed by Oscar-winning director Sam Mendes.

But then he's tempted by the return of "Medellin," promised by his former agent Ari Gold (Jeremy Piven), who insists that Benicio Del Toro is cooling on the project and that he can get the role for Vince IF he ditches his new agent, played by Carla Gugino, who posed for photos at last night's bash with the CAA agent her character is modeled on. God, this is like so Hollywood.

To see more photos from the party, click here.

Photo Credits: They can pose, but can they act like they're acting? Kevin Dillon and Adrian Grenier will finally show their acting chops this season.
Jeff Kravitz/FilmMagic