Piranha 3DD is a 2012 American 3D horror comedy film directed by John Gulager, and written by Marcus Dunstan and Patrick Melton It is a sequel to the 2010 film Piranha 3D and stars Danielle Panabaker, Matt Bush, David Koechner, Chris Zylka, Katrina Bowden, Gary Busey, Christopher Lloyd, and David Hasselhoff. Wikipedia