STOCKHOLM, SWEDEN - APRIL 30: Princess Madeleine of Sweden and Christopher O'Neill arrive at the Royal Palace to attend Te Deum Thanksgiving Service to celebrate the 70th birthday of King Carl Gustaf of Sweden on April 30, 2016 in Stockholm, Sweden. (Photo by Samir Hussein/WireImage)

STOCKHOLM, SWEDEN - APRIL 30:  Princess Madeleine of Sweden and Christopher O'Neill arrive at the Royal Palace to attend Te Deum Thanksgiving Service to celebrate the 70th birthday of King Carl Gustaf of Sweden on April 30, 2016 in Stockholm, Sweden.  (Photo by Samir Hussein/WireImage)