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