Jimmy Fallon has debuted as host of The Tonight Show.
Check out all the celebrities who stopped by his opening episode.
Kim Kardashian on The Tonight Show
Kim Kardashian was among the many celebrities who stopped by Jimmy Fallon's Tonight Show debut. She owed him some money.
Mike Tyson on The Tonight Show
Here, Jimmy Fallon! Mike Tyson settles a bet during this Tonight Show cameo.
Lindsay Lohan on The Tonight Show
Lindsay Lohan stopped by The Tonight Show with Jimmy Fallon. She was one of many big names to show up for his premiere.
Stephen Colbert on The Tonight Show
Stephen Colbert snaps a selfie with Jimmy Fallon on the latter's debut as Tonight Show host.
Joan Rivers on The Tonight Show
Joan Rivers stops by the first Tonight Show under the guidance of Jimmy Fallon in this photo.
Mariah Carey on The Tonight Show
Pay up, Mariah Carey! The singer owes Jimmy Fallon a few bucks.
Wait! There's more Jimmy Fallon Tonight Show Pics: Celebrity Cameos!! Just click "Next" below: