In 1989, Cheyenne was seriously injured in a car accident when she crashed a Jeep she was driving after her father refused to allow her to visit him while he was filming "The Freshman" in Toronto. She sustained a broken jaw, a laceration under her eye, and a torn ear. Marlon Brando flew Cheyenne to Los Angeles to undergo extensive reconstructive and cosmetic surgery. The accident effectively ended her modeling career. After the accident, she began experiencing bouts of depression and attempted suicide.