Donaldson was born in Toronto, Ontario. As a child, she studied at the Royal Conservatory of Music in Canada and appeared in early television commercials for Ford automobiles. In the late 1970s, she appeared in several made-for-television movies including On My Own about a teeneger suffering from epilepsy. Her first theatrical film appearance was in Running (1979) starring Michael Douglas. She then starred in a number of theatrically released horror movies, including William Fruet's Funeral Home (also known as Cries in the Night) (1980), J. Lee Thompson's Happy Birthday to Me (1981), Deadly Eyes (1982) and Curtains (1983). She also appeared in an episode of the television horror series Friday the 13th: The Series. She provided the voice for Kea Moll on the animated TV series Star Wars Droids.
Donaldson was born in Toronto, Ontario. As a child, she studied at the Royal Conservatory of Music in Canada and appeared in early television commercials for Ford automobiles. In the late 1970s, she appeared in several made-for-television movies including On My Own about a teeneger suffering from epilepsy. Her first theatrical film appearance was in Running (1979) starring Michael Douglas. She then starred in a number of theatrically released horror movies, including William Fruet's Funeral Home (also known as Cries in the Night) (1980), J. Lee Thompson's Happy Birthday to Me (1981), Deadly Eyes (1982) and Curtains (1983). She also appeared in an episode of the television horror series Friday the 13th: The Series. She provided the voice for Kea Moll on the animated TV series Star Wars Droids.