Cassandra Harris (December 15, 1948 – December 28, 1991) was an Australian actress.

Born Sandra Colleen Waites in Sydney, Australia, she appeared in The Greek Tycoon (1978), Rough Cut (1980), and the James Bond film, For Your Eyes Only as the Countess Lisl von Schlaf, the ill-fated mistress of Milos Colombo (played by Israeli actor Topol). While she was filming this movie, her second husband, Pierce Brosnan, met James Bond series producer Albert R. Broccoli, which eventually led to his starring in 4 James Bond films.

She guest starred in several episodes of the television series Remington Steele with her husband Brosnan, to whom she was married from 1980 until her death in Los Angeles, California from ovarian cancer at the age of 43.

Her husband and three children -- Christopher and Charlotte Harris, from her first marriage to Dermot Harris — a younger brother of the late actor, Richard Harris -- and her son Sean Brosnan survived her. Christopher and Charlotte were adopted by Brosnan after Dermot Harris`s death in 1986.