Crown Princess Märtha of Norway was born in March 1901 in Stockholm as Princess Märtha Sophia Lovisa Dagmar Thyra of Sweden and Norway. She was the daughter of Prince Carl of Sweden and his consort, Ingeborg of Denmark. Märtha was the cousin of King Gustaf VI Adolf. As a child, she was taught at home by private tutors and completed in-depth courses in childcare and first aid.
Märtha got engaged to her cousin, Crown Prince Olav (later King Olav V of Norway), on 15 January 1929, and they were married on 21 March in Oslo. Their marriage was extremely happy and they had three children: Princesses Ragnhild and Astrid, and Prince Harald (V).
During the Second World War, she lived with her children in exile in the USA, while Crown Prince Olav lived in London. When the family returned to Norway, they were greeted with celebrations. By that stage, the Crown Princess had already been weakened by illness. She contracted leukaemia, and despite repeated blood transfusions she died in April 1954 at the National Hospital in Oslo.