Viral Video Louis C.K. Tonight Show Jimmy Fallon: ‘Louie’ Star Almost RUINED Jimmy Fallon’s Career! [WATCH]

Some of the funniest and most talented people in the world have already visited "The Tonight Show" with Jimmy Fallon, many of them playing games with the "Saturday Night Live" alum, including Emma Stone, Daniel Radcliffe and even Oscar-winning actress Helen Mirren ... now it's the turn for the "Louie," and the Louis C.K. "Tonight Show" Jimmy Fallon appearance reveals the comedian almost ruined the host's career!

Recently, Ariana Grande and Kevin Spacey have done some spot-on impressions on the show, but if there's one thing that came unexpected was the revelation on Louis C.K. Tonight Show Jimmy Fallon appearance that the comedian kept Fallon from being on the short-lived "Dana Carvey Show" - even threatening to quit if Jimmy was hired!

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