Keeping utterly sophisticated however, the dress then cinched in at her slim waist with a satin belt, before skimming her slender figure all the way to its classy knee-length hem.
With this in mind, as a team, we did a little research.
She's a stunning mathematician on Countdown and she always dresses to impress.
However, this racy number appeared on the daytime version of the show.
This snapshot of Rachel is years old, so the dress will now be long gone.
Last week, again on the regular version, her boyfriend Pasha Kovalev, who was sitting in Dictionary Corner with expert Susie Dent, spelled out the word 'Phallus', a term for a penis - much to the cast's amusement.