Marianne Greenwood, née Hederström, was born in Gällivare, in the northern Lappland region of Sweden, and raised in Kiruna and Skellefteå. Her brothers Bo Hederström and Torbjörn Hederström became an actor and director, respectively. She moved to Stockholm and studied at the art school of design. After World War II, she lived in Paris and in the 1950s moved to Antibes, France, where she became the photographer for the Musée Picasso there, photographing Pablo Picasso and his family and visitors such as Matisse, Chagall, Miró, and Léger. For several decades, she lived among indigenous people in the Americas, the Pacific Islands, Papua New Guinea, and parts of Asia. Thirty thousand of her photographs from this era are now held in the Ethnographical Museum in Stockholm. She wrote and photographed for books and magazines in France, Germany, the USA, Sweden and other countries, and published books of her own work. In 2005, she received the Lifetime Achievement Award from the Wingsquest Foundation in New York. A 2008 documentary film about her entitled "Catch the Moment" was broadcast on public service television in Scandinavia. in 1939, she married Carl Bertil Hedberg, and in 1945 Anthony Greenwood, a businessman, and had two sons. She was a close friend of the authors Robert Graves and Chester Himes, as well as the poet Evert Taube.