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. Westergren was originally not planning on becoming an actress. Instead she decided to become a fashion designer and traveled to Paris to study. In between lessons at the designer institute, she walked the runway as a model at the fashion house Carven.
The Yellow Squadron
(Ulla, Arne's fiance)
Somewhere Else
(Sonja)
Lille Fridolf blir morfar
(Maggan Palm)
Egg! Egg! A Hardboiled Story
(Woman in Commercial)
Miss Chic
(Margareta Langenhielm)
Miss April
(Anna)
Jazz Boy
(Madeleine)
Min pappa är Tarzan
(hamstern Harry)
Främlingen från skyn
The Right to Love
(Julle's Fiancee)
Kilimanjaro
(Fr. Bloom)
Inga Tidblad - Lysande stjärna av sin tid
(Self)
Miss and Mrs Sweden
(Eivor)
Leva på 'Hoppet'
(Vivi)
Raskenstam
(Ulla Larsson)
Dante: Beware of the Shark!
(Tvärsan's mother)
Marianne
(Birgitta)
One For the Pot
Så tuktas kärleken
(Ulla)
Ojdå - en till..?
(Amy Hardcastle)
Stjärnorna på Slottet
(Self)
Julkalendern
(Tanten vid informationsdisken)
Sunes jul
(Informationsdamen)
Nya himlar och en ny jord
(Malla Silfverstolpe)
Pappas pojkar
Gäster med gester
(Self, contestant)