Born in Philadelphia, Pennsylvania in 1912, Arnold was a prominent member of Magnum Photos and the first woman photographer to join in 1957. She began her photography career whilst working at the Stanbi Photos plant in New Jersey in 1946, and in 1948 studied photography with Alexei Brodovitch at the New School for Social Research in New York. Arnold moved to London, England in 1962 where she continued to live and work.
She will perhaps be best remembered for her exceptional photographs of people; the famous, politicians, musicians, artists and the unknown. Her intimate, sensitive and compassionate ten year collaboration with Marilyn Monroe has cemented her as one of the most iconic portrait photographers of our time, but it is the long term reportage stories that drove Arnold’s curiosity and passion."