Andersson was born on the island of Kungsholmen in Stockholm. She was married three times. She was married to director Kjell Grede from 1960 to 1973. She was also married to politician Per Ahlmark from 1979 to 1981. Her sister was actress Gerd Andersson.
Andersson had a stroke in 2009.[1] She died on 14 April 2019 in Stockholm, at the age of 83.[2]