Signe Eleonora Cecilia Hasso (née Larsson; August 15, 1915 – June 7, 2002) was a Swedish actress, writer and composer.

She appeared in such films as Heaven Can Wait (1943), The House on 92nd Street (1945), A Double Life (1947), This Can't Happen Here (1950), The Black Bird (1975) and I Never Promised You a Rose Garden (1977) and made guest appearances on such series as Route 66, Bonanza, The Great Hornet, Cannon, Starsky and Hutch, The Streets of San Francisco, Ellery Queen, Quincy, M.E., Magnum, P.I., Trapper John, M.D. and Hart to Hart.

She played Laurel Marshall in the original series episode "Production and Decay of Strange Particles".