It’s been a huge few months for the British royal family with birthdays, babies, and weddings aplenty! On May 2, Princess Charlotte rung in her third birthday and now, the adorable thank you cards her proud parents, Prince William and Kate Middleton, sent out to well-wishers have been revealed.

For their thank you cards — which have been unveiled online by royal fans — Kate and William opted for the photo of their only daughter standing proudly on the steps of Kensington Palace snapped by Kate in January ahead of Charlotte’s first day of nursery school at London’s Willcocks Nursery School.

Alongside the happy photo, there was a thank you note which read: “The Duke and Duchess of Cambridge thank you for so kindly writing as you did to Princess Charlotte on the occasion of her third birthday. This was most thoughtful of you, and greatly appreciate by Their Royal Highnesses who you send their best wishes.” William and Kate continued to keep up with their good manners by also sending out snail mail to thank well-wishers who wrote in to congratulate them on their seven-year wedding anniversary on April 29.

Another Instagram user revealed the photo the Duke and Duchess of Cambridge picked for their thank you cards — and it’s an incredible shot they also happened to use on the same occasion last year! The front of the card features an image of the royal couple during their 2016 tour of India and Bhutan and shows the pair in off-duty hiking clothes as they share a warm embrace.

kate middleton prince william getty images

“The Duke and Duchess of Cambridge thank you for the thoughtful message you so kindly sent on the occasion of their 7th wedding anniversary,” the card’s message read. Since it’s been an incredibly exciting year for the royals, Kensington Palace also just gave royal fans a glimpse into just how much fan mail the family have received the past few months.

On Tuesday, June 5, the Kensington Palace Instagram account shared a photo of the palace’s mail room filled with art work and boxes of letters. “Thank you everyone for the beautiful cards and letters following Princess Charlotte’s third birthday, the birth of Prince Louis, and the wedding of The Duke and Duchess of Sussex. We’ve received over 36,000 letters in the past month alone,” the pic’s caption read.

This post was written by Bella Brennan. It originally appeared on our sister site, Now to Love.

Join our Facebook group for the latest updates on Kate Middleton, Prince William, and all things royal!