 In 1938, Kohner founded the Paul Kohner Talent Agency and managed the careers of Marlene Dietrich, Greta Garbo, Dolores del Río, Maurice Chevalier, Billy Wilder, Liv Ullmann, Henry Fonda, David Niven, Erich von Stroheim, Ingmar Bergman, Lana Turner, and others.Many of his clients had left war-torn Europe, fleeing Nazi Germany.John Huston was Kohner's client for over forty years.