Martin’s BBC journalist wife Lara Lewington, 41, also broadcasted her spouse’s appearance on the show.
Tweeting to her 45,300 followers, she confirmed that her husband of 12 years was indeed hiding behind a sofa.
She tweeted: “#WILTY is about to start, and @MartinSLewis says he’s on it.
“This I believe to be true, and the game hasn’t started yet, so it would be odd to lie now.
“Do tune in, he’s hiding behind the sofa!”
Other guests who appeared on the show included Johnny Vegas, Alex Jones and Anna Maxwell Martin.