"Next time I promise to spend at least five minutes on Thunderbirds."
The former BBC Breakfast host spoke out about incident in which he felt his daytime rival crossed a line.
As you'd expect, Piers has already fired back on Twitter.
The divisive presenter has hit back at comedian Kate Smurthwaite's remarks about appearing on his new show.
Many critics couldn't help but compare the rumours to Andrew Neil's infamous "holiday" during the early days of GB News.
The screen legend spilled the beans during an interview with Piers Morgan.
There’s no love lost between the former BGT judge and the Little Britain star.
"I think Susie Dent is great. Erm... Rachel Riley is completely brilliant at the maths."
The former breakfast TV rivals have long been embroiled in a friendly(-ish) public feud.
"I kind of only came on here because I thought it would be kind of funny. But I wanted to say, 'you’re a c***'."