Jimmy Fallon opened his first "Tonight Show" by saying, quote, "I'm Jimmy Fallon and I'll be your host . . . for now."

After Jimmy took the stage as the new host of 'The Tonight Show Starring Jimmy Fallon' for the first time, he took a moment to welcome new viewers and thank some key folks who helped him get to where he is.

Jimmy collected on some bets from Robert De Niro, Tina Fey, Rudy Giuliani, Joan Rivers, Kim Kardashian, Lindsay Lohan, Stephen Colbert and others.

Guest Will Smith and Jimmy break down the "Evolution of Hip-Hop Dancing".