Westergren is the daughter of famous actors Håkan Westergren and Inga Tidblad. They moved to Nockeby, Stockholm, in 1931 and got married the same year. Westergren was born the following year on 16 May 1932. As a child, Westergren was a big admirer of her mother who was one of the biggest stars in Swedish theater. Westergren was raised with a nanny and has later said she wishes her busy parents would have spent more time with her while growing up....
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The Yellow Squadron
As Ulla, Arne's fiance
Somewhere Else
As Sonja
Lille Fridolf blir morfar
As Maggan Palm
Egg! Egg! A Hardboiled Story
As Woman in Commercial
Miss Chic
As Margareta Langenhielm
Miss April
As Anna
Jazz Boy
As Madeleine
Min pappa är Tarzan
As hamstern Harry
Främlingen från skyn
The Right to Love
As Julle's Fiancee
Kilimanjaro
As Fr. Bloom
Inga Tidblad - Lysande stjärna av sin tid
As Self
Miss and Mrs Sweden
As Eivor
Leva på 'Hoppet'
As Vivi
Raskenstam
As Ulla Larsson
Dante: Beware of the Shark!
As Tvärsan's mother
Marianne
As Birgitta
One For the Pot
Så tuktas kärleken
As Ulla
Stjärnorna på Slottet
As Self
Julkalendern
As Tanten vid informationsdisken
Sunes jul
As Informationsdamen
Nya himlar och en ny jord
As Malla Silfverstolpe
Pappas pojkar
Gäster med gester
As Self, contestant
Selmas saga
As Alamandha