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In case you missed Wednesday night's installment of "Late Night with Jimmy Fallon," the host appeared in a mock up of Michelle Tanner's bedroom on the show " Full House," sleepless in his kiddie PJs over his upcoming "Tonight Show" take over from Jay Leno.

Appropriately, coming to calm his nerves were Bob Saget, John Stamos and Dave Coulier, bearing many more references to the sitcom than they did for the Oikos yogurt folks, who reunited the trio for an upcoming Super Bowl commercial.

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Just like their lovable sitcom alter-egos would have done by the end credits, all three men dutifully allayed Fallon's fears.

"You're going to be the host of the 'Tonight Show' on NBC. Honey, no one can ever take that away from you," Saget said as if addressing one of his TV daughters.

Quipped Stamos: "Well, maybe Jay Leno."

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Then the trio sang him to sleep with an Elvis song, a gag from the old show.

Leno's last day on "The Tonight Show" is February 6. Fallon makes his "Tonight Show" debut on February 17.

Check out the video below.