Connor Hines Creator, Executive Producer Sarah Pidgeon Carolyn Bessette-Kennedy Actor Paul Anthony Kelly John F. Kennedy Jr. Actor Grace Gummer Caroline Kennedy Actor Naomi Watts Jacqueline Kennedy Onassis Actor Alessandro Nivola Calvin Klein Actor Leila George Kelly Klein Actor Noah Fearnley Michael Bergin Actor Sydney Lemmon Lauren Bessette Actor Constance Zimmer Ann Marie Messina Actor Ryan Murphy Executive Producer Nina Jacobson Executive Producer Brad Simpson Executive Producer Eric Kovtun Executive Producer Nissa Diederich Executive Producer Scott Robertson Executive Producer Monica Levinson Executive Producer Kim Rosenstock Executive Producer D.V. DeVincentis Executive Producer