"Happy Father's Day to all fathers and of course to my Pups," Eugenie captioned the special snap, which shows her and her dad embracing, and the Duke of York with a huge smile on his face as he celebrated his daughter's wedding day.
"Thank you for many years of happiness and for this special moment on 12th October 2018. @hrhthedukeofyork," Eugenie continued in the tribute.
Princess Eugenie, and her sister Princess Beatrice, 30, enjoy close relationships with both their parents, with the family often pictured together despite the Duke and Duchess of York divorcing in 1996.
In fact, rumours are rife that Sarah and Andrew are set to re-marry after Fergie's touching tribute to her ex husband at the Trooping the Colour ceremony last week.