Prior to his success in The X Factor and on the music charts, Murs was a contestant on the Noel Edmonds show in 2007.
On that occasion he went home with a measly £10, and will be hoping for more luck this time as he plays for charity.
Murs will be the first ever person to play the game twice.
His episode of Celebrity Deal or No Deal will be shown on Sunday, April 22 at 6.25pm on Channel 4.
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Watch a clip of Olly Murs's new Deal or No Deal appearance below: