Grant's first feature film role was in 1980, when he starred in the horror film New Year's Evil. It wasn't until 1984, his big role came in the 1984 cult comedy film Hardbodies in which he played Scotty Palmer. His other big film was the cult classic 1988 Killer Klowns from Outer Space. He appeared in the 2001 film Mach 2. His most recent appearance was in the 2009 movie Follow the Prophet.