Jimmy Fallon really has been training to host “The Tonight Show” his entire life, or so a new promo would have you believe. The 30-second commercial features Fallon as a little kid, hosting his own version of the show from his bedroom, complete with monologue jokes and a girl from school as the special guest.
While the first promo for Fallon’s new job highlighted the long history behind it”The Tonight Show,” this one has the kind of fun fans of “Late Night with Jimmy Fallon” have come to expect from the host.
Naturally, a little Fallon would be incomplete without a little version of The Roots as his house band. “The Tonight Show Starring Jimmy Fallon” begins Feb. 17.
Posted by:Chris E. Hayner

Chris E. Hayner is equal parts nerd, crazy person and coffee. He watches too much TV, knows more about pro wrestling than you do and remembers every single show from the TGIF lineup. You may have seen him as a pro-shark protester in "Sharknado 3." His eventual memoir will be called "You're Wrong, Here's Why..." TV words to live by: "I'm a firm believer that sometimes it's right to do the wrong thing."