American Idol singer Katharine McPhee, Sara Paxton (great in Last House on the Left) and Dustin Milligan (of 90210 fame) are the latest additions to the cast of Shark Night 3D, according to Variety.

David R. Ellis is helming the flick, about folk who are attacked by a bunch of the big-toothed bastards - in 3-D. Ellis has helmed the likes of Final Destination 2 and 4, as well as Snakes on a Plane. I'm not a fan, but at least this sounds like Piranha style fun - it can't be any worse than his last bash at a Final Destination flick.

Avatar star Joel David Moore will also make an appearance as the comic relief.