President Donald Trump took a swing at late night hosts, and they are not taking this one lying down.
Here's what happened: the Trumpster tore into Fallon, Colbert and other late-night hosts at a SC rally on Monday, June 25, calling them Fallon a "lost soul" and Colbert a "low-life with no talent".
Colbert and Fallon poked fun at themselves in the video by referring to each other as "low life" and "lost soul" - the same phrases Trump previously used to describe them.
Colbert mockingly responds, "That doesn't sound like him".
The two hosts then proceeded to call Conan O'Brien, who appeared to have no idea that Trump was president.
The pair riffed on the president's remarks, even looping in O'Brien, who pretended he didn't know Trump was even president.
When asked by Fallon what he was up to, Colbert said he was "busy having no talent", another barb Trump hurled at the late night hosts.
The Avengers-esque collaboration was captured in a joint cold open that will kick off both The Late Show and The Tonight Show this evening (an apparent late-night first). "Hey, lost soul", Colbert responds.
"I heard he said some pretty bad stuff about us", Fallon says. Same with Colbert, who has laid into Trump with his own spicy comments. He then gets a call from Fallon.
"Not so good", Colbert, says. "He's the president! What are you doing?" "Be civil", Conan said.
Before ending the call, Fallon and Colbert made plans to get lunch at Red Hen, the small Virginia restaurant that caused a furor recently by asking White House press secretary Sarah Sanders to leave. "So Melania, if you're watching, I don't think your anti-bullying campaign is working".