In 1985, Cher formed the film production company Isis. Her next film, "Mask" (1985), reached number two at the box office and was Cher's first critical and commercial success as a leading actress. For her role as a drug addict biker with a teenage son who has a severe physical deformity, she won the Cannes Film Festival Award for Best Actress. During the making of the film, however, she clashed with director Peter Bogdanovich. She attended the 58th Academy Awards in a tarantula-like costume "to show her scorn for the 'system'", according to authors James Parish and Michael Pitts. The incident garnered her much publicity.