HOLLY Willoughby and Phillip Schofield were seen howling with laughter and couldn't speak after having a 'rude' chat in the ad break.
The cheeky duo cracked up and couldn't read the autocue as they struggled to get their words out.
"We might have been a bit rude in the break and I wish we could tell you why we are laughing," Phillip giggled.
"But we just can't I'm afraid," Holly added.
The giggles started when Holly tried to announce that Phil Vickery would be helping the viewers "achieve pulled pork perfection".
Viewers loved the pair's giggles and one tweeted: "Don’t you just wish there was a behind the scenes camera during ad breaks on #ThisMorning? The laughs are magic! But if we knew the context it would be even better!"
Another added: "Love it when @hollywills @Schofe laugh for no reason or get the giggles out of nowhere it just makes me laugh for a few minutes at them."
Earlier today it was revealed the comedy duo will be replaced by Eamonn Holmes and Ruth Langsford next week as the regular presenters take what would have been a half term break.
The upcoming change was announced on an ad for the ITV show today.
Alongside a clip of the Eamonn and Ruth dancing on a giant keyboard, a voiceover said: "Hit the right note with Eamonn and Ruth next week on This Morning."
The TV couple are the regular stand-ins for Holly and Phillip while they are off on holiday.
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Good Morning Britain stars Piers Morgan, Susanna Reid and Dr Hilary Jones are all also on holiday next week.
Piers will be replaced by Ben Shephard, who will co-host the show with Charlotte Hawkins and Ranvir Singh.
Taking to Twitter to update his 7.5million followers on the news, the presenter joked he would be spending his holiday "in the broom cupboard" after lockdown restrictions have forced him to stay indoors.
He wrote: "I’ll be spending it in my broom cupboard, Susanna in her kitchen & Dr Hilary in his garage."