"I brought fun by the gallon to our pal Jimmy Fallon," the "Gutfeld!" [and self-proclaimed king of late night] said on Friday night's monologue. "It went so well all the way home I could not stop talking about it with my Uber driver [displaying a picture of "Late Show" host Stephen Colbert.

Jimmy Fallon hosted an unexpected guest on Thursday’s (August 7) episode of The Tonight Show as rival late-night host and Fox News favorite Greg Gutfeld joined him on the sofa.

Fox News Channel late-night star Greg Gutfeld will be a guest on NBC's "The Tonight Show" hosted by Jimmy Fallon on Thursday night.