Happy 7th Birthday Prince Louis!

The Prince and Princess of Wales have released a new photograph of Prince Louis to mark his seventh birthday.

Princess Catherine and Prince William captioned the post on their official Instagram page: "Wishing Prince Louis a very Happy 7th Birthday!"

The photo shows Prince Louis sitting on a log, smiling and showing that he has lost his two front teeth, with new ones coming in.

Along with the photo, taken by photographer Josh Shinner, a video showing behind-the-scenes moments from the photoshoot was also shared.

As well as sharing birthday wishes, many royal fans remarked how quickly the young prince is growing up.

"He's so grown up!" one well-wisher wrote in the comments, while another added, "may you grow strong, wise and mighty!"

Happy Birthday, Louis!

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