The sweet bond that Kate Middleton believes only her and Prince Louis share

Kate Middleton believes she has a special bond with Prince Louis and it's to do with her appearance.

• The Duchess of Cambridge has joked to friends that Louis is the only child that looks like her, according to a royal source.
• Fans have said that both Prince George and Princess Charlotte resemble their father Prince William.
• In other royal news, Prince Harry's memoir has been signed off and will likely be published by Christmas.

We've heard royal fans gush over just how much The Duke and Duchess of Cambridge's children look like Prince William.

Prince George's birthday photo taken by Kate Middleton had fans seeing double as they noticed the royal resemblance to his father. Now the Duchess has seen a resemblance herself to one of her children - and she loves it.

It's not just George who resembles one of the royal family, in April fans noted just how much Princess Charlotte resembled the Queen during an Easter Sunday service.

The photos of the young royal, as she walked confidently outside of the chapel with her arms folded behind her back gave fans flashbacks. The pose seemed familiar to some and many royal fans believed that they could see some clear similarities between the young royal and Her Majesty the Queen.

However, now it's Kate's turn, as fans have started to say, as Louis grows up, he looks like her more every day - and the Duchess loves this sweet fact.

The royal source said, "Everyone always comments on how Louis is the spitting image of Kate.

"She loves it and thinks it's very sweet - she often jokes that he's the only one of her kids who actually looks like her!"

Prince Louis completely stole the show at the Queen's Platinum Jubilee - pulling cheeky balcony faces to sweet chats with the Queen. However, the photos also show just how close Kate and Louis are, with Louis hugging his mother and her comforting him.

Kate may be excited that one of her children finally resembles her, but her husband could be about to take away that glory too. Newly surfaced photos of Prince William where he looks just like Prince Louis in his childhood show an uncanny resemblance to the small royal. 

A new series of photos taken at the Sandringham estate in 1990 shows a young Prince William riding a bike - and fans are amazed at how much he looks like Louis.

"Prince William as a young boy [looks] the spitting image of Prince Louis," one Twitter user commented. Many specifically called out to a now infamous picture of Prince Louis on the balcony of Buckingham Palace taken during the recent Jubilee when describing the father-son resemblance.