Petronella Barker is a British-born Norwegian actress. She was born in Colchester, England, but grew up in Fredrikstad, Norway. While still studying at the Theatre Academy in Oslo, she had her debut in the Soviet-Norwegian co-production Dragens fange. Her breakthrough as a movie actress came with the dystopic Sweetwater, followed by Havet stiger. In 1990 she made her stage debut as Perdita in Shakespeare's The Winter's Tale at Centralteatret.