Princess Eugenie called her mum by the nickname of “mumsy” in a sweet Instagram post dedicated to the royal icon this week.
Princess Eugenie wrote on Instagram: “Happy birthday to my dear mumsy… You are one of a kind.
“There were too many pictures to choose from that show how completely unique you are.”
Eugenie accompanied the sweet caption with various pictures of Sarah at home at the Royal Lodge, which she shares with her ex-husband Prince Andrew.
It’s been an exciting year for the York family as in addition to Eugenie’s royal baby, her sister Princess Beatrice recently got married.
Beatrice wed Edoardo Mapelli Mozzi in a small ceremony in Windsor, witnessed by her grandparents the Queen and Prince Philip.
Beatrice had intended to tie the knot on May 29, 2020, however the wedding had to be postponed due to the coronavirus restrictions.
The couple instead decided to wed in a secret ceremony, attended only by a small group of guests.