The 33-year-old princess shared two throwback photos of herself as a toddler spending time with her dad in celebration of his landmark birthday. In aviator glasses and a white polo neck, the King holds a young Madeleine on a gate in one photo, and gives her a shoulder ride in another.
The princess shared an adorable throwback photo
She accompanied the photos with a sweet message to her father, writing: "Happy Birthday Pappa! I can't believe you turned 70 today, you have more energy than all of us! Love you."
Fans of the Swedish royal family were quick to wish His Majesty well, with one writing: "Happy Birthday to your Dad! I am very proud to be a Swede and that we have such wonderful King and Royal family!", while another wrote: "Congratulations to the King of Sweden on his 70th Birthday! Your father, the King is celebrating this birthday being grandfather of two granddaughters and three grandsons which are all adorable!"
Sweden is commemorating their king's birthday in style, with celebrations including lavish banquets, carriage processions, a gun salute and musical concerts. The festivities began on Saturday as the royal family attended an Armed Forces celebration and enjoyed lunch as Stockholm City Hall.
The Swedish royal family waved to the crowd on the King's 70th birthday
The King's birthday also marked baby Prince Oscar's balcony debut. The third-in-line to the throne, who was born in March, was fast asleep as his mother the Crown Princess Victoria joined her family to wave to the crowds of well-wishers.
The celebrations aren't over yet as the King and his guests will be enjoying a reception at the royal palace followed by a lavish banquet on Saturday evening.
The guest list is filled with royals from all over Europe, including King Juan Carlos of Spain and his wife Queen Sofia, and the Norwegian royal family – King Harald V and Queen Sonja, their children Crown Prince Haakon and Princess Märtha Louise and the pair's respective spouses Princess Mette-Marit and Ari Behn.