Queen Silvia of Sweden is the reigning monarch of Sweden, having ascended to the throne in 1973. She is the wife of King Carl XVI Gustaf and the mother of Crown Princess Victoria. Queen Silvia is a highly respected figure in Sweden, having worked extensively on behalf of children's rights
From Wikipedia
Silvia is Queen of Sweden as the wife of King Carl XVI Gustaf. She has held this title since her marriage to Carl XVI Gustaf in 1976. The king and queen have three children: Crown Princess Victoria, Prince Carl Philip, and Princess Madeleine.