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