PIERS Morgan challenged Andi Peters to a bare knuckle cage fight as the presenter showed off his bulging biceps on today's GMB.
Energetic Andi showed off his guns in a tank top as he stripped off after being teased for complaining about the chilly weather on the banks of the Thames.
When he invited Piers to a gym work out, things quickly took a much different turn.
Straight-faced Piers responded: "Forget the gym. One day, you and I in a cage. Unlimited. Unlicensed. No gloves. No headwear. "
Stunned, Andi replied: "Tat escalated. Wow."
Undeterred, Piers told how he learned to fight growing up with two brothers, adding: "One of them's an army colonel and still can't beat me in an arm wrestle."
Susanna Reid was sceptical, pointing out Andi's impressive arms.
Piers told her: "It's not about muscle power. It's about desire to win."
Confident Andi said he's prove Susanna rigth as he started doing tricep dips.
Piers said: "I would annihilate him."
Andi's shadowboxing did little to impress Piers, who said it reminded him of his nine-year-old daughter Elise.
The verbal sparring came after Piers told his GMB co-star Laura Tobin to "show us your legs" and teased she was dressed like she's in a bikini competition on today's show.
His tongue-in-cheek comments came after competitions presenter Andi admitted he was jealous of Piers and Susanna in a warm studio while he was stuck outside.
Using Laura's outfit to demonstrate that it couldn't be that cold outdoors, Piers said: "I know it's unseasonably warm because Laura's wandering around like she's in a bikini competition.
"Laura, show us your legs."
Sitting behind her desk in a pale blue jump and navy miniskirt, Laura looked surprised and shrugged her shoulders.
She then straightened her skirt and stood, turning her attention to Andi.
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"Andi Peters is not the person to rely on for weather information," she said. "It's mild outside this morning and my legs are out."
Susanna chipped in: "If out weather forecaster is in a miniskirt, it must be mild.
"You must be pretending with your puffer jacket."
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It left a laughing Andi desperately defending the chill he was feeling.