Dequenne, the Belgian actor who won a top Cannes Film Festival prize for her breakout role in “Rosetta,” has died, a news report says. She was 43. Her family and agent told the news agency Agence France-Presse that Dequenne died Sunday of a rare cancer in a hospital outside of Paris.

She won the Cannes Film Festival’s best actress award for her debut performance in 1999. She was later diagnosed with a rare adrenal gland cancer.