Isabelle Thomas, a British aristocrat and documentary filmmaker, has died by suicide at the age of 39 in Los Angeles. She was the wife of Bradley Thomas, an American film producer, and had been living in California with their children. Thomas was a former adviser to David Cameron and was known for her diverse projects and passions. Her death has been ruled as likely a suicide by police and the Los Angeles County Coroner’s Office. Thomas was also a friend of actress Jameela Jamil, who paid tribute to her on Instagram. Thomas' death comes in the midst of her husband's role in the awards season for Martin Scorsese’s film 'Killers of the Flower Moon.'