Good Morning Britain's Piers Morgan and Susanna Reid were rocked by an invader in the studio as a tiny mouse terrorised the cast and crew.
Piers mocked weather presenter Laura Tobin and political editor Ranvir Singh for screaming when they saw the rodent scurrying around the studio.
Piers began: "Dramatic breaking news, there is a mouse on the studio floor, everybody shrieks and wails.
"There has been a lot drama here during the commercial break.
"It is hiding under one of the cameras, we just don't know which one."
He laughed: "Ranvir, you're terrified of mice, how can you be scared of a mouse?!"
Ranvir replied uneasily: "I don't like it, Laura screamed and I saw it scurrying around, I had one in my house once."
"She went, ARGH, mouse!" screamed Piers as he mocked Ranvir's terrified reaction.
"It feels like a crocodile has arrived on set!" he added.
The mouse eventually came out from its hiding place under the camera, and ran around the studio where one of the cameras was able to capture it.
The hosts agreed the mouse was in fact rather cute, but Piers had some cheeky nicknames for it.
At first he called it Dan Walker, BBC Breakfast presenter and Piers' nemesis.
But as the mouse escaped from the GMB set and ran into the This Morning studio, Piers decided it should be called boris Johnson instead.
This is because the Prime minister has been boycotting GMB, choosing instead to appear on This Morning where he faced a softer interview with Phillip Schofield and Holly Willoughby.
* Good Morning Britain airs weekdays on ITV at 6am
