Denmark's Happy royal family - King and Queen for British. State Visit. A happy informal picture of king Frederick of Denmark, Queen Ingrid, and their three daughters Princesses Margrethe (born April 16th 1940), Benedikte, (April 29th. 1944) and Anna-Marie (August 30th. 1946). The king, the son of the late King Christian K, was born on March 11th. 1899. On May 24th.1935 he married Princess Ingrid of Sweden, born on March 28th. 1910, the daughter of King Gustaf VI Adolf of Sweden. The king and queen are coming to Britain for a state on May 8th. - five days after the opening of he fevstival of Britain. April 16, 1951.