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