Princess Charlotte is personally thanking all her royal fans for their birthday wishes! Well, sort of.

On Tuesday, May 31, Twitter user Jess Isle uploaded a photo of a Thank You card she received from Kate Middleton and Prince William expressing their gratitude for the warm wishes Isle sent Charlotte for her first birthday on May 2.

"The lovely Thank You card I received today for Princess Charlotte's birthday!" Isle — who resides in Halifax, UK — wrote alongside a snapshot of the postcard which features a portrait of Charlotte taken by Kate, 34, at the royal family's Norfolk, England country home in May 2016.

According to the Daily Mail, the opposite side of Charlotte's photo includes the following message from William, 33, and Kate: "The Duke and Duchess of Cambridge are most grateful for the very kind message you sent to Princess Charlotte on the occasion of her first birthday. It really was most thoughtful of you and greatly appreciated."

RELATED: Kate Middleton and Prince William Welcome a New Addition Into Their Family — Get the Exciting Details!

Kate and William — who married in April 2011 — welcomed Charlotte in May 2015. The couple are also parents to a two-year-old son, Prince George, who was born in July 2013.

Click through the gallery below to see Charlotte and George’s cutest photos!