Leonardo DiCaprio John Edgar Hoover
Dermot Mulroney Colonel Schwarzkopf
Clint Eastwood Director, Producer, Original Music Composer
Judi Dench Anna Marie Hoover
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
Sadie Calvano Edgar's Niece
Michael O'Neill Senator McKellar
Jeffrey Donovan Robert Kennedy
Patrick M. Sullivan Jr. Art Direction
Armie Hammer Clyde Tolson
Adam Driver Walter Lyle
Jack Donner Edgar's Father
Brian Avery Stunts
Gary Werntz Attorney General
Buddy Van Horn Stunt Coordinator
James J. Murakami Production Design
Kaitlyn Dever Palmer's Daughter
Josh Lucas Charles Lindbergh
Jack Axelrod Caminetti
Christian Clemenson Inspector Schell
Gerald Downey FBI Agent
Geoff Pierson Mitchell Palmer
Josh Stamberg Agent Stokes
Robert Lorenz Producer
Billy Smith Secret Service Officer
Josh Hamilton Robert Irwin
Damon Herriman Bruno Hauptmann
Steve Monroe Restaurant Host
Gary D. Roach Editor
Jacob Chambers Stunts
Kyle Eastwood Stork Club Band
Kelly Lester Head Secretary
Zach Grenier John Condon
Johnny Cicco Young Agent
David A. Cooper Franklin Roosevelt
Brian Grazer Producer
Ryan McPartlin Lawrence Richey
Miles Fisher Agent Garrison
Richard Nixon Self (archive footage) (uncredited)
David Clennon Senator Friendly
Geoff Stults Raymond Caffrey
Lea Coco Agent Sisk
Denis O'Hare Albert Osborne
Elizabeth Karr Secretary (uncredited)
Leslie Augustine Lindbergh Nanny (uncredited)
Martin Luther King Jr. Self (archive footage) (uncredited)
Chuck Waters Stunts
Gunner Wright Dwight Eisenhower
Tom Stern Director of Photography
Roberta Bassin Roosevelt's Secretary
Gregg Rudloff Sound Re-Recording Mixer
Aaron Lazar Prosecutor Wilentz
Matthew R. Anderson Stunts
Deborah Hopper Costume Design
Gary Fettis Set Decoration
Justin Gant Stunts
Fiona Weir Casting
Michael James Faradie Bureau Agent (1919)
Cheryl Lawson Palmer's Wife
Tim Moore Executive Producer
Jamie Noel Racetrack Gambler (uncredited)
Jenny Phagan Baker's Wife
Fileena Bahris Starlet (uncredited)
Barbara Keegan Bombing Witness
Joel Cox Editor