Cast

• Leonardo DiCaprio — John Edgar Hoover
• Geoff Pierson — Mitchell Palmer
• Naomi Watts — Helen Gandy
• Adam Driver — Walter Lyle
• Sadie Calvano — Edgar's Niece
• Roberta Bassin — Roosevelt's Secretary
• Emily Alyn Lind — Shirley Temple
• Barbara Keegan — Bombing Witness
• Gerald Downey — FBI Agent
• Geoff Stults — Raymond Caffrey
• Thomas Langston — Young Boy
• Lea Coco — Agent Sisk
• Josh Hamilton — Robert Irwin
• Ed Westwick — Agent Smith
• Armie Hammer — Clyde Tolson
• Jeffrey Donovan — Robert Kennedy
• Judi Dench — Anna Marie Hoover
• Gunner Wright — Dwight Eisenhower
• Kaitlyn Dever — Palmer's Daughter
• Jessica Hecht — Emma Goldman
• Josh Lucas — Charles Lindbergh
• Dermot Mulroney — Colonel Schwarzkopf
• Denis O'Hare — Albert Osborne
• Lea Thompson — Lela Rogers
• Amanda Schull — Anita Colby