Ågren was born in Landskrona, Sweden, a town she once described to Italian entertainment journalists as a "Northern Naples." Her modeling career brought her to Rome where she studied acting at the Drama School directed by Alessandro Fersen. She made her film debut in Luciano Salce's Colpo di stato, and her early roles included the Michael Caine film Pulp (1972) as a receptionist, and the Jack Lemmon comedy Avanti! (1972) as a nurse. She appeared in 57 films, including The Left Hand of the Law (1975), Lucio Fulci's City of the Living Dead (1980), Umberto Lenzi's Eaten Alive! (1980), Panic (1982), Red Sonja (1985), the Bud Spencer comedy Aladin (1986) and the cult horror film Ratman (1988). In the early 1980s she also had a brief musical career.