Naomi Watts Babe Paley Actor Tom Hollander Truman Capote Actor Diane Lane Slim Keith Actor Chloë Sevigny C.Z. Guest Actor Calista Flockhart Lee Radziwill Actor Demi Moore Ann Woodward Actor Molly Ringwald Joanne Carson Actor Treat Williams Bill Paley Actor Joe Mantello Jack Dunphy Actor Russell Tovey John O'Shea Actor Ella Beatty Kerry O'Shea Actor Marin Ireland Katharine Graham Actor Pawel Szajda Albert Maysles Actor Yuval David David Maysles Actor Jessica Lange Lillie Mae Faulk Actor Michael Jay Henry Barry Rubenstein Actor Gregory North Leland Hayward Actor Dina Drew Overheard #1 Actor Michelle Bagwell Overheard #2 Actor Jeffrey Emerson Andy Warhol Actor Ryan Murphy Executive Producer, Writer Alexis Martin Woodall Executive Producer Jon Robin Baitz Executive Producer, Screenwriter, Writer Gus Van Sant Executive Producer, Director Laurence Leamer Writer Max Winkler Director Jennifer Chambers Lynch Director Julia Newmann Music Thomas Newman Music Jason McCormick Cinematographer