Leonardo DiCaprio John Edgar Hoover
Clint Eastwood Director, Producer, Original Music Composer
Dermot Mulroney Colonel Schwarzkopf
Kaitlyn Dever Palmer's Daughter
Emily Alyn Lind Shirley Temple
Naomi Watts Helen Gandy
Lea Thompson Lela Rogers
Ed Westwick Agent Smith
Ken Howard Harlan Fiske Stone
Stephen Root Arthur Koehler
Amanda Schull Anita Colby
Jessica Hecht Emma Goldman
Michael O'Neill Senator McKellar
Brian Avery Stunts
Adam Driver Walter Lyle
Jack Donner Edgar's Father
Judi Dench Anna Marie Hoover
Gary Werntz Attorney General
Deborah Hopper Costume Design
Buddy Van Horn Stunt Coordinator
Jeffrey Donovan Robert Kennedy
James J. Murakami Production Design
Josh Lucas Charles Lindbergh
Jack Axelrod Caminetti
Christian Clemenson Inspector Schell
Gerald Downey FBI Agent
Geoff Pierson Mitchell Palmer
Josh Stamberg Agent Stokes
Geoff Stults Raymond Caffrey
Robert Lorenz Producer
Josh Hamilton Robert Irwin
Damon Herriman Bruno Hauptmann
Sadie Calvano Edgar's Niece
Gary D. Roach Editor
Jacob Chambers Stunts
Kyle Eastwood Stork Club Band
Kelly Lester Head Secretary
Zach Grenier John Condon
Armie Hammer Clyde Tolson
Miles Fisher Agent Garrison
Johnny Cicco Young Agent
Billy Smith Secret Service Officer
David A. Cooper Franklin Roosevelt
Kevin Murray Assistant Sound Editor
Ryan McPartlin Lawrence Richey
Joel Cox Editor
Tim Moore Executive Producer
David Clennon Senator Friendly
Richard Nixon Self (archive footage) (uncredited)
Lea Coco Agent Sisk
Brian Grazer Producer
Steve Monroe Restaurant Host
Denis O'Hare Albert Osborne
Elizabeth Karr Secretary (uncredited)
David M. Bernstein First Assistant Director
Leslie Augustine Lindbergh Nanny (uncredited)
Martin Luther King Jr. Self (archive footage) (uncredited)
Erica Huggins Executive Producer
Gunner Wright Dwight Eisenhower
Aaron Lazar Prosecutor Wilentz
Tom Stern Director of Photography
Roberta Bassin Roosevelt's Secretary
Matthew R. Anderson Stunts
Chuck Waters Stunts
Gregg Rudloff Sound Re-Recording Mixer
Gary Fettis Set Decoration
Duncan Jarman Makeup Artist, Prosthetic Makeup Artist
Michael James Faradie Bureau Agent (1919)
Cheryl Lawson Palmer's Wife
Jamie Noel Racetrack Gambler (uncredited)
Jenny Phagan Baker's Wife
Fileena Bahris Starlet (uncredited)