Sigourney Weaver as Dian Fossey

Bryan Brown as Bob Campbell

Julie Harris as Roz Carr

John Omirah Miluwi as Sembagare

Iain Cuthbertson as Dr. Louis Leakey

Konstantin Aleksandrov as Claude Van Veeten

Waigwa Wachira as Mukara

Iain Glen as Brendan

David Lansbury as Larry

Maggie O'Neill as Kim

Konga Mbandu as Rushemba

Michael J. Reynolds as Howard Dowd

Gordon Masten as Photographer