The heir to the throne celebrated her 21st birthday on 21st January ... smiling down the lens in her blue beret and camouflage jacket. ‘Happy birthday, Princess Ingrid Alexandra!’ reads the caption to ...

Happy 21st birthday to our lovely princess!' and a third chimed in: 'Happy birthday, beautiful Ingrid.' Another enthusiastic royal fan penned: 'Congratulations so much on your birthday to our ...

Following the King and Queen's sweet tribute, the Prince and Princess of Wales reshared the beautiful photo, adding their own words: "Wishing Lady Louise a very happy 21st birthday," alongside ...

Even royal fans noted this in the comments. One comment read, "Happy Birthday Princess Charlotte! Looks just like her father," while another said, "Omigoodness her father’s daughter!" ...

The royal family has wished a happy 21st birthday to Lady Louise Windsor ... She is following in the footsteps of the Prince and Princess of Wales, who met at the university in Fife, Scotland ...