Holly Willoughby and Phillip Schofield giggle as they chat about Gobbler’s Knob 

Hilarity ensued on Tuesday’s This Morning, when Holly Willoughby and Phillip Schofield struggled to keep straight faces when introducing a segment about American park Gobbler’s Knob.

The Pennsylvania location is famous for its Groundhog Day ceremony, in which a groundhog called Punxsutawney Phil predicts how many more days there will be of winter.

With the ceremony taking place on Tuesday – which saw Phil predict six more weeks of winter but a glorious spring to follow – Holly and Phil found themselves tasked with introducing the segment about it.

The duo, as well as Lisa Snowdon, had a tricky time of it, bursting into laughter as they chatted about the American tradition.

They were listing what was coming up in the show, with Holly saying through giggles: ‘We’ll be going live to Gobbler’s Knob…’

‘We were going to try so hard!’ Phil said. ‘The decision was, we do this, we do this and we don’t break a smile. It’s just the name of a place, don’t break a smile!

‘We’ve blown it!’ 

There was of course a lot of Twitter response to the famously-cheeky pair. 

‘How many times can they say Gobblers’ Knob on TV without laughing?’ one person remarked.

Another posted: ‘Every time @hollywills or @Schofe say “gobblers Knob” whilst discussing #GroundhogDay, I screech a little inside!’

‘Holly is dying to laugh each time she says “Gobbler’s Knob”!’ another observed.