From Wikipedia

Juliet Berto (16 January 1947 – 10 January 1990) was a French actress, director and screenwriter.

A member of the same loose group of student radicals as Anne Wiazemsky, she first appeared in Jean-Luc Godard’s Two or Three Things I Know About Her, and would go on to appear in many of Godard’s subsequent films, including La Chinoise, Week End, Le Gai Savoir, and Vladimir et Rosa. She later became a muse for the French New Wave director Jacques Rivette, starring in Out 1 and Celine and Julie Go Boating.

In the 1980s she also became a screenwriter and film director. Her film Cap Canaille (1983) was entered into the 33rd Berlin International Film Festival. In 1987, she was a member of the jury at the 37th Berlin International Film Festival.

She died of cancer on 10 January 1990. She was 42.