Crown Princess Märtha was born in Stockholm on 28 March 1901. Christened Märtha Sofia Lovisa Dagmar Thyra, she was the daughter of Prince Carl of Sweden and Princess Ingeborg of Denmark.
The Princess became engaged to her cousin, then Crown Prince Olav, during the 1928 Olympic Summer Games in Amsterdam. News of the engagement was very well received. It was taken as a sign that there was no longer any tension following the dissolution of the union between Norway and Sweden. An excellent match in terms of strengthening royal ties, it was also clearly a match based on love.