Emmerdale star Adam Thomas is hoping to prove he knows fiancée, and mother of his child, Caroline Daly really well on tonight's show.
Strictly dancers Kevin and Karen Clifton, and Dad's Army star Ian Lavender and his wife Michéle Hardy will also be hoping to come out on top.
They have to get questions about each other right in order to win a big cash prize for the charity of their choice. But who knows the most?
All Star Mr & Mrs, ITV, 8pm