The pictures, which belong to Princess Eugenie’s personal selection, were share on her Instagram account. The first snap shows her and her father, Prince Andrew, sitting on a step next to each other while drinking out of blue plastic cups.
The picture was taken when she was just a toddler, wearing a white shirt and green shorts.
A second image shows her father-in-law, George Brooksbank, posing for a picture with his family, including the Princess and her husband Jack.
Along with the pictures there was a caption that read: “Happy Father’s Day to my father and father-in-law and to all fathers celebrating today and everyday…Xx”
The Princess’ followers took to the post’s comment section to express their support for her and her kind gesture.
One account commented: “Love the photos !! I remember That photo with your dad in Hello magazine !! Thanks for sharing.”
A second Instagram user wrote: “Happy Father’s Day to HRH The Prince Andrew! Sending love to you all.”
Someone else added: “Oh my heart, this is so adorable.”
Other fans expressed their joy that George Brooksbank could be home after a long battle against Covid-19.
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He was eventually transferred to to a ward specialising in heart and lung conditions at the Royal Brompton Hospital.
Eugenie took to Instagram on Saturday to praise doctors and nurses at the hospital where Mr Brooksbank was treated.
The Princess wrote: “I just wanted to say a huge thank you to everyone at the Brompton Hospital for what you’ve done in saying my father-in-law’s life.
“George came back home to us the other day so happy, and as the ‘miracle man’, as he called himself.”
Princess Eugenie and Jack Brooksbank were married on October 12, 2018, at St George’s Chapel, on the grounds of Windsor Castle.
The couple’s engagement was officially announced in a statement which read: “The Duke and Duchess of York are delighted to announce the engagement of Princess Eugenie to Mr Jack Brooksbank.
“Her Royal Highness and Mr Brooksbank became engaged in Nicaragua earlier this month. The wedding will take place in the Autumn of 2018 at St George’s Chapel in Windsor.”
Mr Brooksbank’s parents also released a statement in which they announced the event.
The statement read: “We could not be more delighted with the news of the engagement.
“We are completely over the moon and very excited for them both.”