John Oliver, Jon Stewart, Jimmy Fallon, Seth Meyers and more had cameos during the July 21 episode of "The Late Show With Stephen Colbert."

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

Jimmy Fallon, Seth Meyers, Jon Stewart and John Oliver joined Weird Al Yankovic and Lin-Manuel Miranda to support Stephen Colbert after 'The Late Show's' cancellation by appearing in a segment inspired by the Coldplay kiss-cam incident.

The gag started with Miranda and Weird Al coming out to perform a song – a Coldplay song, in fact, a reference to the Astronomer scandal, which saw the CEO resigning after getting caught with the company’s HR chief on a kiss-cam at a recent concert from Chris Martin’s band.

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.

In his first episode since announcing the cancellation of "Late Show," Stephen Colbert had choice words for Trump, who'd celebrated the news.