Leah Isadora Behn is the middle daughter of Princess Märtha Louise of Norway and husband Ari Behn. She was born 8 April 2005, at Princess Märtha Louise's summer residence Bloksbjerg at Hankø island, in the municipality of Fredrikstad, Norway.
As a granddaughter of King Harald and Queen Sojna, she is 6th in line for the throne of Norway, after her uncle, two cousins, mother and older sister. At her baptism, her parents confessed that she was named after the Star Wars character, Princess Leia, of which her mother is a big fan of, and after American dancer Isadora Duncan. Her godparents are Princess Laurentien of the Netherlands, Gry Brusletto, Katharina Salbu, Espen Bjørshol, Jon Andreas Håtun, Didrik Vigsnæs and Marianne Ulrichsen.
Leah is presently a student at Bærum Waldorf School in Bærum, Norway where she is in her first year, along with older sister Maud.
Unlike her cousins, Princess Ingrid Alexandra and Prince Sevrre Magunus, she and her sisters are not titled as titles come from the male line and their royal lineage comes from the female line.