Jimmy Fallon, Seth Meyers, Jon Stewart and John Oliver all made cameo appearances during Monday's "The Late Show with Stephen Colbert."

I am your host,” Fallon said as he opened his monologue on NBC’s “Tonight Show” before adding: “Well, at least for tonight.”

Jimmy Kimmel and Jimmy Fallon regularly make fun of Donald Trump on their late-night shows. Check out 5 of those viral videos.

Stephen Colbert is making headlines as The Late Show approaches its final season. In a rare show of late-night unity, Colbert welcomed Jimmy Fallon, Seth Meyers, Jon Stewart, and John Oliver on Monday night’s episode following CBS’s decision to cancel the program.