Countdown beauty Rachel Riley looks completely unrecognisable wearing a silver leotard in her latest social media display.

The 35-year-old maths wizard logged into her official Instagram page over the weekend to share a throwback snap from her days working on The Gadget Show.

Her hilarious behind-the-scenes snap from the Channel 5 series shows Rachel and her co-star Jason Bradbury in fancy dress costumes.

She wore a show-stopping silver fitted corset for the occasion which she accompanied with skintight gold leggings, a blue wig and some silky white gloves.

Rachel completed her look with a pair of knee-high silver boots with red hearts on the knee.

The starlet painted her lips with silver lipstick, which she pouted proudly for the photograph.

Jason, 51, matched Rachel's colour scheme and donned a pair of silver leggings, a white cape and a pair of blue lycra shorts.

The mother of one penned alongside the snap: "Throwback to 7 years ago today. Absolutely no recollection of why we were dresses like this but i'm sure it was in the name of science…@jasonbradbury #thegadgetshow #throwback"

Unsurprisingly, Rachel's Instagram grid update caught the attention of her 499,000 followers, with some rushing to leave a flirty message for the star in the comment section.

One fan gushed: "Absolutely love the retro sci-fi look."

Another added: "The blue hair is something special."

A third person posted: "You look amazing."

While a fourth follower added: "Damn I remember when you had a thong slip on that show."

Rachel co-hosted The Gadget Show for three series from 2013 until 2014 before being replaced by Amy Williams.

She joined the Countdown family in 2009 after Carol Vorderman announced her shock departure from the Channel 4 show.

Rachel is married to her Strictly Come Dancing partner Pasha Kovalev after meeting on the BBC dancing competition.

They were paired together for the eleventh series of Strictly in 2013 and began dating the following year.

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The couple are parents to one-year-old daughter Maven, and the blonde bombshell has revealed that she'd like more children in the future.

"We'd like another one," Rachel previously told Hello! magazine.

"Some of my friends had twins by accident and a few of them have got three little ones and everyone seemed to have them straight after. No one regrets it though, do they?"

• Rachel Riley

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