Ananova:

Sir Paul McCartney and wife Heather are to star on Who Wants To Be A Millionaire?

It is thought they will try to raise cash for Heather's landmine charity reports The Sun.

The couple will be in a star pairs Christmas Day special hosted by Chris Tarrant.

Others taking part include Man Utd boss Sir Alex Ferguson with fan GMTV host Eamonn Holmes and TV couple Richard Madeley and Judy Finnigan.

Sir Paul, 62, and Heather, 36, are said to be "really excited" about going on the ITV1 quiz, filmed later this month.