STOCKHOLM, SWEDEN - MARCH 12 : Prince Daniel and Prince Oscar celebrate the nameday ceremony of the Crown Princess at the inner square of the Royal Palace on March 12, 2017 in Stockholm, Sweden. (Photo by Patrick van Katwijk/Getty Images)

STOCKHOLM, SWEDEN - MARCH 12 : Prince Daniel and Prince Oscar celebrate the nameday ceremony of the Crown Princess at the inner square of the Royal Palace on March 12, 2017 in Stockholm, Sweden.  (Photo by Patrick van Katwijk/Getty Images)

STOCKHOLM, SWEDEN - MARCH 12 : Prince Daniel and Prince Oscar celebrate the nameday ceremony of the Crown Princess at the inner square of the Royal Palace on March 12, 2017 in Stockholm, Sweden. (Photo by Patrick van Katwijk/Getty Images)

STOCKHOLM, SWEDEN - MARCH 12 : Prince Daniel and Prince Oscar celebrate the nameday ceremony of the Crown Princess at the inner square of the Royal Palace on March 12, 2017 in Stockholm, Sweden.  (Photo by Patrick van Katwijk/Getty Images)

STOCKHOLM, SWEDEN - MARCH 12: Prince Oscar of Sweden during celebrations for Crown Princess Victoria of Sweden name day at The Royal Palace on March 12, 2017 in Stockholm, Sweden. (Photo by Mark Cuthbert/UK Press via Getty Images)

STOCKHOLM, SWEDEN - MARCH 12: Prince Oscar of Sweden during celebrations for Crown Princess Victoria of Sweden name day at The Royal Palace on March 12, 2017 in Stockholm, Sweden. (Photo by Mark Cuthbert/UK Press via Getty Images)

STOCKHOLM, SWEDEN - MARCH 12: Prince Daniel, Princess Estelle, and Prince Oscar of Sweden attend a Name day celebration for Princess Victoria at the Royal Palace on March 12, 2017 in Stockholm, Sweden. (Photo by Michael Campanella/Getty Images)

STOCKHOLM, SWEDEN - MARCH 12: Prince Daniel, Princess Estelle, and Prince Oscar of Sweden attend a Name day celebration for Princess Victoria at the Royal Palace on March 12, 2017 in Stockholm, Sweden. (Photo by Michael Campanella/Getty Images)