The raucous animated series about four potty-mouthed third-graders invaded the big screen with this inspired feature-length cartoon. South Park moms declare war on Canada after Stan, Kyle, Kenny and Cartman see a movie starring Canadian gross-out comics and begin to mimic the naughty language. Creators Matt Stone and Trey Parker provide the boys' voices. Directors Trey Parker Production year 1999 Rating R Studio Paramount Pictures Runtime 81 minutes Cast Matt Stone, Mary Kay Bergman, Trey Parker, Dave Foley, Minnie Driver Initial Listing and Description provided by Ticketmaster.