The ‘Countdown’ maths whizz previously competed on the show, and she attended the super swish bash with her boyfriend and ‘Strictly’ professional dancer, Pasha Kovalev.
It wasn’t just a fun night out for the pair though, as football fan Rachel had presenting duties and was charged with giving the Outstanding Achievement accolade to Leicester City manager Claudio Ranieri.
The couple weren’t the only ‘Strictly’ stars in attendance, as Daisy Lowe and her partner Aljaž Skorjanec also enjoyed a rest after their first day of training.
Pasha is currently busy practicing with a new recruit, and this year he’s dancing with BBC Breakfast host Naga Munchetty.
If they manage to triumph, it would make Pasha the first male pro to win the Glitterball trophy twice, thanks to his previous victory with Caroline Flack.
See all the pictures from the GQ Men Of The Year Awards red carpet below...