Between graduation and getting professional comedy gigs – as it's becoming something of a theme in this gallery – Billy Crystal was a substitute teacher on Long Island. Who would have thought!
Rocky star Sylvester Stallone used to work as a personal trainer before his breakthrough as a much sought-after actor. No wonder the action star had such a well-toned body in all the movies he is featured in!
Did you know these celebs used to work as teachers and instructors?!
Flip through our gallery to see which celebrities were teachers before their careers really took off...