When it comes to Prince William's three children there is much debate on who they resemble the most.
But a picture taken of the heir to the throne at just three months old shows how his eldest son Prince George was his double at the same age.
It comes as a stunning set of private photos of Princess Diana, King Charles and a baby William at Balmoral in Scotland have emerged - and they are set to be auctioned next month.
The rare unseen pictures, which were taken in September 1982, show a beaming Charles cradling his infant son and Diana cuddling the newborn.
Other photos show Diana in her green wellies and Charles posing next to the late Queen, who is wearing a grey and red tartan skirt.
And in the snaps showing a young William, he pulls the exact same facial expression as his young son who was also pictured at three months old on his christening day in 2013 - more than 30 years later.
The 22 unseen pictures were taken during a visit to Balmoral by British Airways businessman, Baron King, who was a friend of the Royal Family.
Stephen Drake, of Willingham Auctions in Cambridgeshire, is preparing the lot for sale in the coming days.
He said the collection was sure to amass huge interest from around the world, with royal memorabilia at an all-time high.
Mr Drake added: "There were lots of photos taken of Diana but these offer a really personal insight.
"The collection of photos is a real one-off, you will never come across another set of photos like this.
"The photo of Charles holding William is such an amazing photo, he looks like such a proud happy father.
"In the photos, Diana, Charles and William look like a complete family group. You see a lot of press photos but these are nothing like those, they are being photographed as normal people, which for royalty is an amazing experience to see.
"As auctioneers, we are only custodians of our items for a short amount of time and it’s very exciting to have them here. It really is causing a huge amount of interest.
"The sky is the limit on the price. We have never had anything like this before.
“Plenty of pictures have been sold of Princess Diana before, but nothing as relaxed as this and nothing as early in her marriage.
"The collection of photos come with the negatives so whoever buys it will own the copyright and that is the premium.
"There are also no other copies of these photos out there, these are the only ones. We’ll see what happens on the day, we have high hopes."
The photos, which come complete with the original negatives, will be auctioned on March 4.
Charles and Diana separated in 1992, after 11 years of marriage. Diana tragically died in a car crash on 31 August 1997 at the age of 36. The couple’s sons Prince William and Prince Harry are now 40 and 38.
The photos, which come complete with the original negatives and folder, will be auctioned at Willingham Auctions in Cambridgeshire on March 4 at 10am.
