Leonardo DiCaprio
John Edgar Hoover
Naomi Watts
Helen Gandy
Armie Hammer
Clyde Tolson
Josh Lucas
Charles Lindbergh
Josh Hamilton
Robert Irwin
Judi Dench
Anna Marie Hoover
Geoff Pierson
Mitchell Palmer
Gunner Wright
Dwight Eisenhower
Dermot Mulroney
Colonel Schwarzkopf
Kaitlyn Dever
Palmer's Daughter
Adam Driver
Walter Lyle
Ed Westwick
Agent Smith
Jessica Hecht
Emma Goldman
Denis O'Hare
Albert Osborne
Lea Thompson
Lela Rogers
Damon Herriman
Bruno Hauptmann
Sadie Calvano
Edgar's Niece
Amanda Schull
Anita Colby
Emily Alyn Lind
Shirley Temple
Barbara Keegan
Bombing Witness
Gerald Downey
FBI Agent
Jeffrey Donovan
Robert Kennedy
Geoff Stults
Raymond Caffrey
Lea Coco
Agent Sisk
Aaron Lazar
Prosecutor Wilentz
David A. Cooper
Franklin Roosevelt
Kelly Lester
Head Secretary
Jack Donner
Edgar's Father
Jack Axelrod
Caminetti
Josh Stamberg
Agent Stokes
Christian Clemenson
Inspector Schell
Billy Smith
Secret Service Officer
Ken Howard
Harlan Fiske Stone
Zach Grenier
John Condon
Johnny Cicco
Young Agent
Steve Monroe
Restaurant Host
Stephen Root
Arthur Koehler
Gary Werntz
Attorney General
David Clennon
Senator Friendly
Michael O'Neill
Senator McKellar
Eric Frentzel
William Mahan
Kyle Eastwood
Stork Club Band
Gregory Hoyt
Agent One
Jenny Phagan
Baker's Wife
Leslie Augustine
Lindbergh Nanny (uncredited)
Fileena Bahris
Starlet (uncredited)
Belinda Gosbee
Gangster's Moll (uncredited)
Elizabeth Karr
Secretary (uncredited)
Martin Luther King Jr.
Self (archive footage) (uncredited)
Pat Nixon
Self (archive footage) (uncredited)
Richard Nixon
Self (archive footage) (uncredited)
Jamie Noel
Racetrack Gambler (uncredited)
Miles Fisher
Agent Garrison
Robert Fleet
Edgar's Mother's Doctor
Scot Carlisle
Agent Williams
Ryan McPartlin
Lawrence Richey
Roberta Bassin
Roosevelt's Secretary
Thomas Langston
Young Boy
Cheryl Lawson
Palmer's Wife
Brady Matthews
Inspector
Dylan Burns
Hoover as a Child
Michael James Faradie
Bureau Agent (1919)
Eric Larkin
Fred Hunter
Chris Caputo
Bronx Baker
Shannon McClain Robertson
African American Woman (as Shannon McClain)
Jennipher Foster
Lucille Ball (uncredited)
Lindsay Lucas-Bartlett
Hollywood Starlet (uncredited)
Emily Banks
Radical Citizen (uncredited)
