Masked Dancer stars Tamzin Outhwaite and Holly Willoughby surprised kids with big reveal

The Masked Dancer's Tamzin Outhwaite and Holly Willoughby shocked their children when they revealed to them that they were a part of the ITV show.

Holly, 40, appeared on Saturday night's final as a guest panelist alongside Jonathan Ross, Oti Mabuse, Davina McCall and Mo Gilligan.

The mum-of-three was gobsmacked when Scarecrow took off their mask and it was revealed to be former EastEnders actress Tamzin.

The two women are practically related as Tamzin is cousins with Holly's husband Dan Baldwin.

Holly's three kids and Tamzin's two daughters had no idea that their famous mums had been a huge part of the much-loved series.

Holly Willoughby appeared as a guest panelist for The Masked Dancer final (ITV)

Tamzin revealed: "It was my cousin's birthday so the kids were all together, and then I watched it with my family in the evening and it was the side of the family that Holly and her husband Dan are on, so the Italian side. So I didn't know how much anyone knew.

"People had started trying to guess … My family, half of them thought I was the frog, and half of them didn't know at all!

Tamzin Outhwaite was revealed to be Scarecrow during the final of the ITV show (ITV)

"And they all thought we were watching (the show) to see Holly on the panel, so yeah it was quite a moment," the 50-year-old added.

Tamzin continued: "It’s a very slickly run operation backstage, so you never meet anyone else. But even when we had to rehearse together, I was like a proper detective, looking around going: 'who’s that small and is American? I think I know who that is...'"

Holly couldn't believe it when her good pal Tamzin was unmasked (ITV)

Despite trying her best to identify her co-stars, Tamzin said she hadn't realised that her friend Zoe Ball was performing as Llama.

"I was definitely vibing off of Llama backstage and I was thinking, 'I bet I know Llama' because Llama had a comedy vibe about her. I knew it was a woman and someone who had a great sense of humour," she explained.

Louis Smith won The Masked Dancer performing as Carwash (ITV)

"I didn’t really get any right. Zoe was the closest I came and that was on the last show - and that was me getting a hint from one of the other judges!"

Louis Smith won the first ever series of The Masked Dancer as Carwash, and Zip was revealed to be Take That's Howard Donald, while Bonnie Langford was unmasked as Squirrel.