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