Princess Lilian of Sweden, Duchess of Halland, was a British fashion model who became a member of the Swedish royal family through her 1976 marriage to Prince Bertil, Duke of Halland (1912–1997). As such, she was an aunt of King Carl XVI Gustaf of Sweden and Queen Margrethe II of Denmark.

Prince Bertil, Duke of Halland, was a member of the Swedish royal family. He was the third son of King Gustaf VI Adolf and his first wife, Princess Margaret of Connaught, as well as the uncle of King Carl XVI Gustaf of Sweden. From 1973 to 1979, he was heir presumptive to his nephew Carl XVI Gustaf and the Swedish throne.