Princess Anne, who turned 76 on Saturday, August 15, has received a sweet birthday tribute from King Charles’ beloved son and his wife.

Prince William and Princess Kate shared a stunning photo of their beloved aunt to mark her big day.

The Prince and Princess of Wales posted the picture to their Instagram Story, which was adored by fans of the Princess Royal.

The couple wrote in their joint message: “Happy Birthday to the Princess Royal.” They also added a celebratory vibe to the text by including a stunning emoji, which truly explains her personality.

The one emoji perfectly describes Anne’s coolness, confidence and her royal attitude, revealing a situation is awesome as she always remains to act relaxed and unfazed.

The post comes hours after the royal family shared a sweet message for  the hardest working royal with a picture on their official social media account, captioning: “Wishing a Happy Birthday to The Princess Royal.”

Princess Anne is the second child and only daughter of the late Queen Elizabeth and Prince Philip. She was given the title of The Princess Royal by her mother in June of 1987, making her officially the seventh Princess Royal in the British monarchy.

The King’s sister is often dubbed the hardest working member of the royal family.