Steven Shainberg Director Nicole Kidman Diane Arbus Actor Robert Downey Jr. Lionel Sweeney Actor Ty Burrell Allan Arbus Actor Harris Yulin David Nemerov Actor Jane Alexander Gertrude Nemerov Actor Emmy Clarke Grace Arbus Actor Genevieve McCarthy Sophie Actor Boris McGiver Jack Henry Actor Marceline Hugot Tippa Henry Actor Emily Bergl Alicia Actor Mary Duffy Althea Actor Christina Rouner Lois Actor Lynne Marie Stetson Fiona Actor Erin Cressida Wilson Writer Bill Pope Cinematographer Ellen Parks Casting Amy Danger Production Design Nick Ralbovsky Art Director Carrie Stewart Set Decoration Mark Bridges Costume Design Kerin Ferallo Costume Design Bonnie Timmermann Producer Laura Bickford Producer Patricia Bosworth Producer Andrew Fierberg Producer Bill Pohlad Producer Edward R. Pressman Executive Producer Alessandro Camon Executive Producer Michael Roban Executive Producer Keiko Deguchi Film Editing Kristina Boden Film Editing Carter Burwell Original Music