Celebrity Gogglebox's Gyles Brandreth has appeared on the show alongside Dame Shirley Hancock, Coronation Street's Maureen Lipman

Absolutely Fabulous' Joanna Lumley, but this week he'll be seen with another TV legend.

Carol Vorderman, the veteran TV presenter best known for Countdown and the Pride of Britain Awards, announced that she would be joining Gyles this week.

"CELEBRITY GOGGLEBOX...," Carol wrote on Instagram. "So I'm making my debut this Friday 9pm on one of my favourite

shows of all time and joining the @c4gogglebox gang....with my friend of 40 years @gylesbrandreth....

"Watch this week and let me know if you agree....we're a bit vocal....no holds barred."

Will they actually watch and react to any of this week's Countdown, which has Anne Robinson hosting

, Rachel Riley on numbers, and Robert Rinder helping Susie Dent out in Dictionary Corner?

Speaking of Anne Robinson, she recently announced that she has quit the show after only one year as host

although she added that she actually recorded more episodes than she was originally contracted to.