Princess Märtha Louise of Norway (born September 22, 1971) is the only daughter of King Harald V and Queen Sonja.

On May 24, 2002 she married Ari Behn.

On April 29, 2003 she gave birth to a daughter, Maud Angelica Behn.

She renounced her title of Her Royal Highness on February 1, 2002.