Princess Eugenie shares new picture of Sarah Ferguson with grandson in heartfelt message

shared a sweet message for her adored mother, , who celebrates turning 65 today.

The Princess of York posted a carousel of photos on her Instagram account, which were accompanied

The caption read: "Happy birthday to my beautiful mumma. So proud of the Grannie you are, the mum you are and the woman you are.

"You're an inspiration and our endless chats bring me so much happiness and incredible support."

Eugenie's post, shared with her 1.8 million Instagram followers, also included two adorable and never-before-seen pictures of the Duchess of York, also known as Fergie by her friends and family, holding the hands of Eugenie's youngest son, Ernest Brooksbank, as they stood in what appeared to be a garden.

Other pictures included the duchess smiling, and posing for selfies, as well as posing with both her daughters, Eugenie and Princess Beatrice.

The post has already amassed nearly 18,000 likes with royal fans praising the princess for her sweet message.

One user commented: "This is bliss."

Another one said: "Happy birthday Miss Sarah!"

A third one added: "Happy Birthday to you beautiful amazing Mum."

A fourth one opined: "Happy birthday to her. what a wonderful role model she is."

The Duchess of York has previously opened up .

She told last month: "We are a tripod of women."

"I am very proud of them and they are very proud of me."