Fox has selected a release date for its theatrical rendition of the BBC's popular documentary series WALKING WITH DINOSAURS, reports ComingSoon.net. The film will stomp into theaters on Dec. 20, 2013. Like the TV series, the feature film will contain live-action footage with CG dinosaurs. Neil Nightengale and Pierre De Lespinois are directing and John Collee (HAPPY FEET) penned the script.