Princess Charlene and Prince Albert's twins, Princess Gabriella and Prince Jacques, have pleased admirers with a subtle reference to Prince William and Kate Middleton's children.
The 10-year-old twins confirmed they are Taylor Swift fans by copying the singer's well-known hand signal. They formed a heart shape with their hands in front of a fountain to honor the pop star.
The megastar is especially popular with the Prince and Princess of Wales' children, Prince George and Princess Charlotte.
Kate and William's children even got to take a photo with the popstar during an Eras Tour in London this summer.
On December 10, the royal twins celebrated their tenth birthday with a social media post featuring a range of photos.
The message said, "Happy birthdays to Hereditary Prince Jacques and Princess Gabriella! Their Serene Highnesses celebrate their tenth birthday today."
One photo showed Gabriella wearing pink sunglasses while posing with Prince Jacques on a pretty large orange tractor during a family excursion to a farm.
According to a source, Princess Charlotte is a passionate Taylor Swift fan who had been wanting to see the Eras tour for months before joining Prince William and Prince George at Wembley.
During his journey to South Africa, Prince William was also seen wearing a blue friendship bracelet with the word "Papa," which is believed to have been a present from Charlotte.