Stephen Colbert announced "The Late Show" was cancelled three nights after revealing his summer mustache on air. Coincidence?

Late-night rivals and other celebrities rallied to support CBS "Late Show" host Stephen Colbert after the network canceled his show, and comedian Jon Stewart lashed out at Paramount Global for the decision to end the long-running TV program.

The FCC chairman called out at the "partisan left's" reaction to Stephen Colbert's cancellation by CBS on Monday, saying they were acting like they were losing a "loyal" spokesperson.

David Letterman and his YouTube channel uploaded a 20-minute anti-CBS compilation following Stephen Colbert's 'Late Show' cancellation.

Stephen Colbert spoofed that viral Coldplay concert clip with help from several fellow late-night hosts, plus Lin-Manuel Miranda and Weird Al.

Fox News host Greg Gutfeld is the ratings king of late night with 3.1 million average viewers, despite what Stephen Colbert may be telling his audience.

Monday night's (July 21) show also featured kiss cam-style pop-ins from supportive fellow talkers Anderson Cooper, Jimmy Fallon, Jon Stewart and Adam Sandler.

“Love you Stephen,” Severance actor Adam Scott wrote in the comments of Colbert’s Instagram clip. “This is absolute bullshit, and I for one am looking forward to the next 10 months of shows.” Jon Batiste, the show’s former bandleader, called Colbert “The greatest to ever do it,” via Instagram comments.