The presenter, who showed off her new collection for AG Jeans in the February issue of ELLE, will go up against celebrity competition including Abbey Clancey (who stars on one of our special Red Nose Day covers), Absolutely Fabulous co-stars Jennifer Saunders and Joanna Lumley and über-blogger Zoella.
Image: Alexa Chung on the set of the Great British Bake-Off for Comic Relief with fellow contestants Victoria Wood, Kayvan Novak and Chris Moyles.
The show will air for four consecutive nights from 11 February, with four contestants per eposide battling it out to impress judges Mary Berry and Paul Hollywood for the ultimate honour of being named Star Baker.
Of course, it's not just ELLE's friends who are supporting Red Nose Day 2015 - ELLE is, too, in conjunction with TK Maxx. Pick up your designer T-shirt in store or online now; choose from five designs, by Karl Lagerfeld, Anya Hindmarch, House of Holland, Diane von Furstenberg and Matthew Williamson. And don't forget to add your limited-edition ELLE, a percentage of the cover price of which goes direct to Comic Relief, to your basket too.