It will be the culmination of A Berry Royal Christmas airing on BBC One on December 16.
Talking to food author and TV cook dinner Mary Berry as section of a BBC1 Christmas special, William tells warmly of how the Queen, who got here to the throne when she used to be easiest 25, defied the challenges of "a man's world".
The programme will wrap up with the three hosting a Christmas party for the staff and volunteers of all the charities in the true fashion of giving back.
Pictured are the Duchess of Sussex, left, and Mary Berry, right, preparing to pipe icing in images release today.
As nicely because the hotfoot to to The Passage, she and Kate scramble to Liverpool, the obtain they contain mocktails at The Brink, the UK's first dry bar established by the charity Action on Addiction.
His praise will provide a welcome boost to the Queen, who has seen controversies swirling around Prince Andrew and the Duke and Duchess of Sussex create her most challenging year since the so-called "annus horribilis" of 1992.
William goes on to say that his grandmother too made her way into public service in a "man's world".
The programme also shows Kate, William and Mary as they join former Bake Off victor Nadiya Hussain to whip up food for an event celebrating emergency services workers, nurses, armed forces personnel and others, that was hosted by the couple at the Rosewood Hotel in London last month. The awards are run by the Tusk Trust, a non-profit organisation set up to help protect African wildlife, of which William has been royal patron since December 2005.
The 84-year-old food writer will also join Prince William to visit The Passage organization-London's largest voluntary sector resource center for homeless people-which has "helped over 130,000 people in crisis through its resource center, homelessness prevention projects and two innovative accommodation services".
I find that you hear and you comprehend and you adapt a great deal more by giving a touch of your time, a touch of your day, to simply be near. He's fascinated about so many utterly different organisations.
"My mother has done her work with homelessness and as you said Aids and other charities". "It will be truly special to see the causes so close to their hearts, as well as to hear all about the incredible support these charities provide".