John Crowley Director Oakes Fegley Young Theo Decker Actor Ansel Elgort Adult Theo Decker Actor Nicole Kidman Mrs. Barbour Actor Jeffrey Wright Hobie Actor Luke Wilson Larry Actor Sarah Paulson Xandra Actor Willa Fitzgerald Adult Kitsey Barbour Actor Aneurin Barnard Adult Boris Actor Finn Wolfhard Young Boris Actor Ashleigh Cummings Adult Pippa Actor Aimee Laurence Young Pippa Actor Robert Joy Welty Actor Boyd Gaines Mr. Barbour Actor Carly Connors Young Kitsey Barbour Actor Luke Kleintank Adult Platt Barbour Actor Hailey Wist Theo's Mother Actor Ryan Foust Young Andy Barbour Actor Jack DiFalco Young Platt Barbour Actor Austin Weyant Adult Toddy Barbour Actor Collin Shea Schirrmacher Young Toddy Barbour Actor Denis O'Hare Lucius Reeve Actor Peter Straughan Screenwriter Donna Tartt Screenwriter Mari-Jo Winkler Executive Producer Kevin McCormick Executive Producer Sue Kroll Executive Producer Courtenay Valenti Executive Producer Nina Jacobson Producer Brad Simpson Producer Roger Deakins Cinematographer Kelley Dixon Film Editing Trevor Gureckis Original Music K.K. Barrett Production Design Deborah Jensen Art Director Rena DeAngelo Set Decoration Kasia Walicka Maimone Costume Design Ellen Chenoweth Casting