With PIRANHA 3D gearing up to begin shooting in Arizona shortly, the cast is filling in nicely. E Online is reporting that actress Jessica Szohr (GOSSIP GIRL) has joined the cast, while The Hollywood Insider reports that Jerry O'Connell is also on board. Szohr & O'Connell join recently announced cast members Elisabeth Shue, Richard Dreyfuss, Ving Rhames, Adam Scott and Dina Meyer (SAW 1-3). Loosely based on the original PIRANHA directed by Joe Dante, Aja's version was penned by Aja and his writing partner Grégory Levasseur and is due out next year.

Synopsis: They’re back! Every year the population of sleepy Lake Havasu explodes from 5,000 to 50,000 for a single, wild weekend - the 4th of July, a riot of sun, drunken fun and sex-crazed mayhem. But this year, there's something more to worry about than hangovers and complaints from local old timers. Havasu sits in the crater formed by a prehistoric volcanic eruption, and when earth tremors tear open a crack in the lake floor, all hell breaks through. Piranhas - a million ravenous, razor-toothed monsters, unchanged since the dawn of time. Unstoppable killing machines acting blindly under one primeval impulse: to hunt down anything that moves and strip it to the raw, bleeding bone. In seconds.