AARHUS, DENMARK - APRIL 16: Princess Josephine and Princess Athena of Denmark attend the 77th birthday celebrations of Danish Queen Margrethe at Marselisborg Palace on April 16, 2017 in Aarhus, Denmark. (Photo by Patrick van Katwijk/Getty Images)

AARHUS, DENMARK - APRIL 16: Princess Josephine and Princess Athena of Denmark attend the 77th birthday celebrations of Danish Queen Margrethe at Marselisborg Palace on April 16, 2017 in Aarhus, Denmark. (Photo by Patrick van Katwijk/Getty Images)

AARHUS, DENMARK - APRIL 16: Prince Henrik, Princess Athena and Princess Josephine of Denmark attend the 77th birthday celebrations of Danish Queen Margrethe at Marselisborg Palace on April 16, 2017 in Aarhus, Denmark. (Photo by Patrick van Katwijk/Getty Images)

AARHUS, DENMARK - APRIL 16: Prince Henrik, Princess Athena and Princess Josephine of Denmark attend the 77th birthday celebrations of Danish Queen Margrethe at Marselisborg Palace on April 16, 2017 in Aarhus, Denmark. (Photo by Patrick van Katwijk/Getty Images)

AARHUS, DENMARK - APRIL 16: Princess Josephine and Princess Athena of Denmark attend the 77th birthday celebrations of Danish Queen Margrethe at Marselisborg Palace on April 16, 2017 in Aarhus, Denmark. (Photo by Patrick van Katwijk/Getty Images)

AARHUS, DENMARK - APRIL 16: Princess Josephine and Princess Athena of Denmark attend the 77th birthday celebrations of Danish Queen Margrethe at Marselisborg Palace on April 16, 2017 in Aarhus, Denmark. (Photo by Patrick van Katwijk/Getty Images)

AARHUS, DENMARK - APRIL 16: Princess Josephine and Princess Athena of Denmark attend the 77th birthday celebrations of Danish Queen Margrethe at Marselisborg Palace on April 16, 2017 in Aarhus, Denmark. (Photo by Patrick van Katwijk/Getty Images)

AARHUS, DENMARK - APRIL 16: Princess Josephine and Princess Athena of Denmark attend the 77th birthday celebrations of Danish Queen Margrethe at Marselisborg Palace on April 16, 2017 in Aarhus, Denmark. (Photo by Patrick van Katwijk/Getty Images)

AARHUS, DENMARK - APRIL 16: Princess Josephine and Princess Athena of Denmark attend the 77th birthday celebrations of Danish Queen Margrethe at Marselisborg Palace on April 16, 2017 in Aarhus, Denmark. (Photo by Patrick van Katwijk/Getty Images)

AARHUS, DENMARK - APRIL 16: Princess Josephine and Princess Athena of Denmark attend the 77th birthday celebrations of Danish Queen Margrethe at Marselisborg Palace on April 16, 2017 in Aarhus, Denmark. (Photo by Patrick van Katwijk/Getty Images)