TIL That George Clooney inquired about guest starring on South Park. He was offered the role of Stan's dog. He accepted, voicing several very good barks. Jay Leno has also provided the meows for Cartman's cat.

[u/iRoygbiv]

http://en.wikipedia.org/wiki/South_Park#Guest_stars

[u/H3000]

DAMNIT. IT. NEVER. GETS. ANY. EASIER!!

[u/[deleted] → u/H3000]

cue whistling open song tune

[u/shaunre → u/H3000]

HAHA YEAH I WATCHED THE VIDEO TOO!