Leonardo DiCaprio

John Edgar Hoover

Armie Hammer

Clyde Tolson

Naomi Watts

Helen Gandy

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

Roberta Bassin

Roosevelt's Secretary

Emily Alyn Lind

Shirley Temple