Martin Lawrence, Ashton Kutcher and Debra Messing have signed on to voice characters in Open Season, Sony Pictures' first computer-animated flick. The story centers around a domesticated grizzly bear (Lawrence) and a mule deer (Kutcher) who are stranded in the woods during hunting season. Messing plays the forest ranger who comes to their rescue. There's no word if the actress' real-life pregnancy will be worked into the plot.