'Entourage' Cast Teases the Cameo That Will Have Everyone Talking

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There are 17 celebrity cameos in the upcoming Entourage movie, but according to Jeremy Piven there's one that stands above all the rest.

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"I think that the idea that I pull up next to Liam Neeson, and we just kind of go after each other..." Piven told ET. "He turned on me in the scene playing himself and when people do that and they're willing to make fun of themselves, it's the best. And you know you're onto something when the paparazzi are laughing, because they were all hidden in the bushes like creepers. They were just kind of crackling, and I thought, 'Okay, we may be onto something.'"

Almost four years after the HBO show's finale, Vince (Adrian Grenier), E. (Kevin Connolly), Turtle (Jerry Ferrara), Drama (Kevin Dillon) and Ari (Piven) are back for the highly anticipated big-screen version.

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In the movie, Vince and the gang continue to navigate through the cutthroat world of Hollywood guided by super agent-turned-studio head Ari Gold. While their ambitions have changed, the bond between the friends remains strong.

In addition to Neeson, Tom Brady, Calvin Harris, Jessica Alba, Pharrell and producer Mark Wahlberg also play themselves in the film. Connolly admitted he may have been a little too eager during one cameo. The actor broke his leg while playing catch with Super Bowl champion Russell Wilson.

"First of all, it was in the scene and we have it on camera," Connolly said. "And I did catch the pass. I want that on the record. I caught the pass."

Fans might also get to see more of the cast than we've ever seen before. ET learned that there are two moments of full-frontal in the movie.

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"When we're shooting it, it's as full frontal as it can be and in the edit they snip around," Grenier explained.

The Entourage movie hits theaters June 5.