DETROIT -

Jimmy Fallon is having nightmares about leaving Late Night for the Tonight Show. In a sketch that aired Wednesday night, Fallon tosses and turns in bed, until the cast of the 90's hit show 'Full House' appears in his bedroom to sing him a song.

Bob Saget, as Danny Tanner, John Stamos, as Uncle Jesse, and Dave Coulier, as Uncle Joey all join in what appears to be Michelle Tanner's old room. Yes, it's a Full House reunion!

Check it out below, or here.