In tonight's festive edition of the hit show, the Countdown star confronts her freaky doppelganger.
Taking to her Instagram Rachel, 32, shared a pic of her and her lookalike, comparing them to the "twins from The Shining."
Dressed in matching dresses and rocking the same wavy blowout on their blonde hair, Rachel looked a deadringer for her "twin."
Though her lookalike was on ballet pointe shoes while Rachel opted for a more practical gold strappy stiletto.
Clearly creeped out by the double trouble, the telly star wrote to her 322k followers: "Two of me!! Guaranteed to scare the crap out of some people, even if we didn’t look exactly like the twins from The Shining.
"Tonight at 9pm @channel4 is the brand new #CatsCountdown Christmas Special: with Jimmy, Jon, Sean, Kathy Burke, David Mitchell, James Acaster, Joe Wilkinson, me & Susie.Watch. Enjoy. Let’s play Christmas."
Rachel and her lookalike will appear on tonight's 8 Out Of 10 Cats Does Countdown's Christmas special.
And fans were quick to remark on the "double trouble" they saw in the snap.
The Countdown star is known for her cheeky sense of humour as she often finds herself having to laugh off risqué words on the long-running hit show.
Just last month the blonde bombshell had to spell out the word 'perverts' on the famous board.
Rachel couldn't stop giggling as she assembled the letters on the board.
Countdown viewers are becoming battle-hardened to the filth.
Just the week earlier to that show we had revealed how the show coined the insult CUM BUDGIE on its Halloween special.
And there have been plenty of rude words over the years.
PERVERTS joins the show's long roll call of smut, with PORN, BUMHOLE, VAGINAS, A**WIPE, FARTED, ERECTION, PHALLUS, ORGASMED and GOBS**** all having appeared on the board.
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