Kimberley Walsh has shared a heartwarming video of her children squealing with joy as they watched her be unveiled as Odd Socks on the Masked Dancer.

On Saturday night, the game show saw the Girls Aloud singer, 40, and Olympian Denise Lewis, 50, both eliminated just before the grand final.

And the moment Kimberley's head popped out of her sock monster costume left her children's jaws on the floor as they gawped at their mum on the TV.

As the anticipation built before the big reveal, Kimberley's three sons and other young family members chanted 'Take it off!' along with the judges on the hit ITV show.

Captioning the clip shared to her 770,000 Instagram followers, Kimberley wrote: 'When they realise' with laughing and shocked emojis.

The moment she gets out of the costume - havoc reaps - and the children look at the TV screen with shock.

They run around the living room squealing with joy at their mum's big reveal. 

Olympian Denise Lewis was also revealed to be the Sea Slug in a double elimination.

The Girls Aloud singer, 40, and the Olympian, 50, beamed as their masks were lifted off, despite having missed out on a place in the grand final. 

Kimberley, who shares three boys with husband Justin Scott, remarked: 'I did this for my kids! They have no idea. I had to pick Odd Socks, I'm a mum of three boys, that's my life!'

Detailing her reasons for signing up to the fun show, Kimberley later explained: 'My kids and my nephews are obsessed with the show and do Masked Dancer competitions every weekend so I wanted to do it for them.

'I've watched all the Masked shows with my boys but as I'm known for being a singer, I thought dancer would be more fun!'

On the difficulty of keeping her identity under wraps, she explained: 'It’s the hardest thing ever! I’m so close to my family, I feel like I have been avoiding them for weeks.

The performer went on to share that she now wouldn't be as confidence dancing with her mask, adding: 'I definitely still have nerves and I’m not sure how I’ll feel without the mask now it’s going to be very strange!'

She added of dancing in disguise: 'It definitely helps to lose your inhibitions but the weight of it is so tricky.'

Kimberley was the second celebrity unveiled on the night following Denise's earlier unmasking as Sea Slug. 

Speaking to host Joel Dommett about her experience, Denise remarked: 'It’s been outstanding, seriously!'

The former athlete went on to say she found it difficult keeping her participation a secret from her loved ones - especially her own husband.