STOCKHOLM, SWEDEN - JULY 14: Princess Madeleine of Sweden, Chris O'Neill, Princess Leonore of Sweden and Prince Nicolas of Sweden after the thanksgiving service on the occasion of The Crown Princess Victoria of Sweden's 40th birthday celebrations at the Royal Palace on July 14, 2017 in Stockholm, Sweden. (Photo by Patrick van Katwijk/Getty Images)
STOCKHOLM, SWEDEN - JULY 14: Princess Madeleine of Sweden, Chris O'Neill, Princess Leonore of Sweden and Prince Nicolas of Sweden after the thanksgiving service on the occasion of The Crown Princess Victoria of Sweden's 40th birthday celebrations at the Royal Palace on July 14, 2017 in Stockholm, Sweden. (Photo by Patrick van Katwijk/Getty Images)
STOCKHOLM, SWEDEN - JULY 14: Princess Leonore of Sweden plays at the inner courtyard of the Royal Palace after the thanksgiving service on the occasion of The Crown Princess Victoria of Sweden's 40th birthday celebrations at the Royal Palace on July 14, 2017 in Stockholm, Sweden. (Photo by Patrick van Katwijk/Getty Images)
STOCKHOLM, SWEDEN - JULY 14: Princess Madeleine of Sweden and Princess Leonore of Sweden arrive for a thanksgiving service on the occasion of The Crown Princess Victoria of Sweden's 40th birthday celebrations at the Royal Palace on July 14, 2017 in Stockholm, Sweden. (Photo by Patrick van Katwijk/Getty Images)
STOCKHOLM, SWEDEN - JULY 14: Princess Madeleine of Sweden, Prince Nicolas of Sweden, Christopher O'Neill and Princess Leonore of Sweden depart after a thanksgiving service on the occasion of The Crown Princess Victoria of Sweden's 40th birthday celebrations at the Royal Palace on July 14, 2017 in Stockholm, Sweden. The celebrations in Stockholm end with the Crown Princess Family being escorted from the Royal Palace to the Royal Stables in a horse drawn carriage. (Photo by Michael Campanella/Getty Images )
