Princess Diana holding Prince William in September 1982 in Balmoral, Scotland. Also pictured is Lord King.
Previously unseen private photos of Princess Diana and Prince Charles with a three-month-old Prince William are to go under the hammer at Willingham Auctions.
The pictures, from September 1982, show a beaming Charles cradling his infant son and Princess Diana cuddling the newborn.
Other photos show Charles posing next to the Queen, who is wearing a grey and red tartan skirt.
The 22 pictures were taken during a visit by British Airways businessman Baron King, who was a friend of the royal family.
“There were lots of photos taken of Princess Diana but these offer a really personal insight,” said Stephen Drake, an auctioneer at Willingham Auctions.