Princess Märtha of Sweden
Tragedy struck Crown Princess Märtha in 1935 when her sister Queen Astrid of the Belgians was killed in a car crash. The two sisters had been very close. Later King Olav said that it took his wife more than ten years to come to terms with her sister's death, and he did not think that she ever really got over it. Märtha and elder sister Margaretha became a great support for Astrid's children in Belgium.