Liam O'Donnell (born April 12, 1982) is an American producer and writer who worked as a visual effects consultant on the 2007 film Aliens vs. Predator: Requiem. He also wrote an unused script for a third Alien vs. Predator film in 2007. Retrieved from "https://avp.fandom.com/wiki/Liam_O%27Donnell?oldid=224880" Categories: Screenwriters Community content is available under CC-BY-SA unless otherwise noted.