The duo explains how they got in to creating musicals - such as their films Team America World Police and South Park: Bigger, Longer and Uncut; and how they even wanted to make their first feature film, Orgazmo, into a musical as well, however, producers wouldn't let them. The comedic duo even explains that when they explained to producers that Bigger, Longer and Uncut would be a musical the suits weren't too keen on that, either.
The pair also discuss how they've done 15 seasons of their hit Comedy Central show South Park over 15 years; and how they got their start - with a viral video tape.
Jimmy even surprises Parker with a cassette tape that he dug up which was made by Trey Parker back in the 80s, titled "Immature."
"We made, like, $500, so I quit my job at Pizza Hut," Parker said.
Check out the hilarious four-part video of the Trey Parker & Matt Stone interview below!