Charlize Theron and Drew Barrymore's former manager has died. J.J. Harris, 62, was found dead at her Beverly Hills home on Saturday (31Aug13). It is believed she died from natural causes. While working at top talent firms the William Morris Agency and United Talent Agency, she helped to guide the careers of Theron, Barrymore, Dakota and Elle Fanning and Kevin Costner, who she managed until her death. She went on to set up her own company, One Talent Management, for which she served as CEO.