Kate Middleton and Prince William thank loyal fans by sending them an adorable family portrait

Kate Middleton and Prince William expressed gratitude toward their faithful fans by sending them a lovely family photograph, alongside a heartfelt message.

The thank you card, shared by Instagram user @loopycrown3, featured one of Prince Louis' christening portraits this past July. Kate grins down at Louis, while the rest of the family smiles directly at the camera.

A year ago, Kate and William, who were married on April 29, 2011, at Westminster Abbey, sent out a candid photo of their family of five posing outdoors.

The message read: "The Duke and Duchess of Cambridge, Prince George, Princess Charlotte, and Prince Louis thank you for your very kind Christmas message. Their Royal Highnesses send you their very best wishes for Christmas and for the New Year."

Instagram user @loopycrown3 also shared that Meghan Markle and Prince Harry sent a holiday thank you cards to anybody that had kept in touch with them over the festive season.

The card, which featured a picture of Meghan holding an umbrella over Harry's head, was taken during a visit to Dubbo, Australia, on their first royal tour together.

"The Duke and Duchess of Sussex, thank you for the very kind message you sent for Christmas. This was most thoughtful of you and greatly appreciated by Their Royal Highnesses who send their best wishes for Christmas, and for the New Year," the card read on the back.

Members of the royal family are known to send their gratitude to fans who've sent them letters.

A year ago, Kate and William, who were married on April 29, 2011, at Westminster Abbey, sent out a candid photo of their family of five posing outdoors.

So in the event that you don't yet send cards to the royals, you'll wish that you did once you see the thank you cards loyal fans have been getting in response.