The entrepreneur confirmed via Twitter that his whole salary for the ITV jungle show would be given to Operation Smile, an international children's medical charity that provides free surgery to repair cleft lips, cleft palates and other facial deformities.
Duncan tweeted yesterday: "All of my £100k fee for I Am A Celeb will fund an @OpSmileUK mission to Ghana in June this yr & we will operate on about 150 clefts."
The Dragons' Den star is a celebrity ambassador for Operation Smile, which helps children in more than 60 countries around the world. Its mission statement is to "mobilise a world of generous hearts to heal children's smiles and transform lives across the globe."
Plenty of viewers were quick to congratulate the millionaire businessman on giving back, and wished him luck with the charity.
@DuncanBannatyne genuine decent person - doing I'm a celeb to benefit others - may your Christmas be pleasant and peaceful— Delwyn Ellis (@solosnap) December 6, 2015