Rob McElhenney has been through some insane body transformations in the name of comedy.
Rob, 46, known for his role of Mac in the hit sitcom It's Always Sunny in Philadelphia, gained 60 pounds over the course of seven months because the writers thought a fat Mac would be funny.
This massive weight gain took place between the sixth and seventh season and McElhenney - who shared his neurological disorder diagnosis this week - was taking down four 1,000 calorie meals a day to pack on the pounds.
