Meera Syal and JoBrand joined one of the first groups, playing "dementia fact bingo" and testing their memory of everyday objects, such as the features on a one-penny piece.
Hart will be up against JoBrand, Victoria Wood and Sarah Millican for the best female TV comic title, and also Outnumbered's Claire Skinner, Dawn French for Pyschoville and Greig for TV comedy actress.