Princess Charlotte looks IDENTICAL to Princess Diana's niece in childhood snap

It turns out young Princess Charlotte’s looks really do run in the family.

Royal fans were quick to spot similarities between the three-year-old and Princess Diana’s niece, Lady Kitty Spencer.

• READ MORE: Princess Diana's niece, Lady Kitty Spencer, looks a lot like her aunty!

The revelation came after Lady Kitty shared an adorable throwback photo of herself on her first day of school, making her just a couple years older of what Princess Charlotte is in the snap.

"First day of school #tbt," the 27-year-old wrote alongside the photo, which was posted to Instagram.

Princess Charlotte. Photo / Getty

"Spitting image of Charlotte," one fan wrote in the comments, while another added "Princess Charlotte has the Spencer genes. You look so similar."

• READ MORE: Two NEW photos of Prince Louis with Prince Charles have been released - and they're even more adorable than the last ones!

"Now we know how amazingly beautiful Charlotte will be in the future," other royal fan wrote.

Lady Kitty Spencer. Photo / Getty

We can definitely see the similarities!

Kitty isn’t the only family member Charlotte has been compared to.

Prince William and Prince Harry in 1986. Photo / Getty

Over the past few years, Charlotte has shown traits similar to her great-grandmother Her Majesty The Queen, and it also appears Charlotte has the same cheeky grin her father, Prince William had when he was younger too.