She began her performing arts career at the age of 8 in her family's circus acts, as an acrobat and contortionist.

After winning a beauty contest, Liné made her film debut at the age of 13 in the Spanish-Portuguese co-production La mantilla de Beatriz (1946).

So Perverse (1969), My Dear Killer (1972), Alta tensión (1972) and Red Rings of Fear (1978), she is best known for her horror film work.

She appeared opposite Barbara Steele in Nightmare Castle (1965), and then starred as the spy Natasha in the Gothic feature Horror Express (1972), in the title role in The Loreley's Grasp, aka When the Screaming Stops (1973), as a vampire countess in the erotic film The Vampires Night Orgy (1973), and as the leader of a Satanic cult in Black Candles (1982).

She also took part in the popular Spanish TV series Verano azul in the early eighties, as a secondary character.