Chris O'Dowd and Dawn Porter are joining forces for a celebrity special of 'Million Pound Drop'.
The couple - who got engaged on Boxing Day (26.12.11) - will follow in the footsteps of the likes of The Saturdays's Mollie King and Rochelle Wiseman, Dermot O'Leary, Fearne Cotton and Chris Moyles and take on the live Channel 4 quiz show to win as much money as possible for their chosen charity.
Hosted by Davina McCall, the episode will see the 'Bridesmaids' actor and the TV presenter will attempt to answer a series of questions in the hope of bagging up to £1 million for Breast Cancer Care.
The charity is one which is close to Dawn's heart after she lost her mother, Carol, to the disease when she was just seven years old, and last year she made a Sky documentary which allowed her to explore and raise awareness of the condition.
She said at the time: "I want to raise awareness of the disease and change people's perceptions. I've wanted to make this film ever since I started working in TV.
"I feel like it's the most personal journey I've been on, and despite the often distressing moments for myself and contributors during filming I have never felt such satisfaction with a project."
Meanwhile, comedian Jimmy Carr will also take on a Channel 4 game show in the hope of winning cash for charity.
The chat show host will appear on the first ever celebrity version of 'Deal or No Deal' this Sunday (08.04.12), which will see him attempt to beat the banker and presenter Noel Edmonds to bag up to £250,000 for his chosen organisation.