Officials are investigating the sudden death of the 41-year-old girlfriend of Clark Gable's son in the couple's Malibu home. John Clark Gable told police that Christiane Candace Lange retired early to bed earlier this week because she wasn't feeling well. He discovered her unresponsive the next morning when he checked on her, and called police, reports ABC News. Police haven't revealed a cause of death. Lange was a makeup artist and hair stylist. Gable, 51, is the only son of the legendary actor, and was born shortly after his father died of a heart attack at the age of 59.