Ant and Dec prank old pal Cat Deeley as they photobomb her shoots in Saturday Night Takeaway joke

ANT and Dec pranked old pal Cat Deeley as they photobombed her shoots in a Saturday Night Takeaway joke.

The presenter was taking promotional photos for her new children's book, The Joy In You.

Cat Deeley posed for pictures for her children's bookCredit: ITV

The photographer was giving Cat instructions as she stood in front of a huge cut out of her book.

But as Cat posed, she didn't realise her former SM:TV co-stars were popping into the background.

Both Ant and Dec poked their heads through the koala bear's faces.

Cat is joining the Geordie duo for this week's Saturday Night Takeaway - where they will also be reviving their Friends spoof Chums.

Little did she know Ant and Dec were behind herCredit: ITV

The Sun revealed they will be reviving the cult skit from SM:TV, with even the set being rebuilt.

A show source said: “This is the reunion SM:TV fans have been calling for. It’s going to be epic.”

Ant, Dec and Cat presented the Saturday morning ITV show from 1998.

Chums featured a fictional romance between Cat and Dec with celebrities popping up in cameos for hilarious storylines.

They'll be reviving their old sitcomCredit: ITV

It was so popular that when Ant and Dec left in 2001, Chums was shown as standalone repeats on CITV.

It comes after one-off show The Story of SM:TV Live at Christmas gave fans hope of a reboot.

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