Eagle-eyed royal fans like to point out how similar the younger generation of princes and princesses are to their older relatives in the British royal family.
Today for example enthusiasts went wild after the Princess of Wales shared an unseen childhood snapshot of herself enjoying some family time Christmas in 1983 – with many calling Prince Louis her “twin brother.”
Kate, 41, shared the photo from the Middleton family photo album on Instagram this afternoon to promote her Christmas Carol Service, which airs on ITV at 7:45 PM on Christmas Eve.
The image was taken when the mother of three was just a month away from celebrating her second birthday the princess wears a red and blue striped dress, a navy blue vest and a multicolored beaded necklace.
She is seen looking fixated on something in the distance as she sits at the table decorated with festive tea lights.
Today, royal fans went wild after the Princess of Wales shared an unseen childhood photo of herself enjoying a family Christmas in 1983 (pictured left) – with many calling Prince Louis (pictured right at the King's coronation) her 'twin brother'.
The photo delighted the royal couple's supporters – with many drawing comparisons between Kate and Prince Louis.
But this isn't the first time a young royal has been compared to their older relative. Prince George's resemblance to his father, Prince William, is regularly noted by fans, while Princess Charlotte is compared to her late grandmother, Princess Diana.
Here, FEMAIL takes a look at who fans say Princes George, Louis and Archie and Princesses Charlotte and Lilibet look like…
Earlier this month, royal fans raved about Prince George's resemblance to his father as he attended the Together At Christmas Carol Service at Westminster Abbey. George is on the right of the photo, left: William, 10 years old
Royal fans noted how much Princess Charlotte resembled her late grandmother Princess Diana at the King's coronation in May (left, Diana in 1970, and right, Charlotte at the coronation)
Royal fans also previously pointed out the astonishing similarities between Prince Harry's daughter, Princess Lilibet, and her great cousin, Princess Eugenie, after her photo was shared with the public to mark her first birthday.
Like father Like Son! After the Duke and Duchess of Sussex shared a family photo to celebrate the holidays, fans went wild over the resemblance between Archie and his father, Prince Harry, pictured on the left in Highgrove in 1986, when he was four years old.