The Weinstein Company held the premiere to director Alexandre Aja’s fish-&-chicks frightener Piranha 3-D last night at the Mann’s Chinese 6 Theater in Hollywood, CA. The shindig reeled in sexy headliners Kelly Brook, Elisabeth Shue, Jessica Szohr, and moonlighting porn star Riley Steele.

While the usually cute Shue opted for an frumpy, unflattering blue number, her younger costars rocked the red carpet in formfitting outfits that showed off lots of leg, cleavage, and go-get’em attitude (Tim Gunn has got nothing on this fashionista … SNAP!).

The actresses were joined at the premiere by director Aja, producer Bob Weinstein, and vagina-less costars Adam Scott, Steven R. McQueen, Paul Sheer, Brian Kubach, and Jerry O’Connell, who showed up with Rebecca Romijn in tow. “Girl Next Door” Bridget Marquardt and British model Natalie Loren were also on hand.

Piranha 3-D centers on a spring break town terrorized by schools of prehistoric piranha set free by an underwater earthquake. Aja describes the film as a technically updated throwback to to the sensationalistic 3-D films many of us grew up with, promising a gratuitous amount of blood and boobs.

The film costars Ving Rhames (Day of the Dead), Christopher Lloyd (Back to the Future), Richard Dreyfus (Jaws), Dina Meyer (Saw IV), and a bevy of SAG-card-seeking nude babes. To see nine hardcore minutes of footage, go here.

Piranha 3-D opens Friday, Aug. 20.

The following gallery is from both the premiere and after-party (courtesy of Zimbio):

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