The Whisper Man cast features Robert De Niro, Michelle Monaghan and Adam Scott. This info article contains minor spoilers and character details for James Ashcroft’s 2026 Netflix movie. Check out more cast guides in Vague Visages’ Know the Cast category.

The Whisper Man centers on a serial killer case. When the son of a novelist disappears, his estranged father — a retired detective — teams up with local law enforcement to investigate. The narrative follows the main protagonists as they search for the missing boy and attempt to understand the motive. Here’s every actor and character in The Whisper Man, an adaptation of Alex North’s 2019 novel.

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The Whisper Man Cast: Robert De Niro as Peter Willis

Character Profile: A retired detective. He is a recovering alcoholic who reluctantly meets with an imprisoned serial killer. Peter tries to repair a damaged relationship with his son while investigating his grandson’s disappearance.

De Niro’s Resume: Vito Corleone in The Godfather Part II (1974), Travis Bickle in Taxi Driver (1976), Michael in The Deer Hunter (1978), Jake La Motta in Raging Bull (1980), Neil McCauley in Heat (1995)

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The Whisper Man Cast: Michelle Monaghan as Amanda Beck

Character Profile: A detective. She investigates a copycat serial killer. Amanda tries to understand the psychology behind the crimes.

Monaghan’s Resume: Harmony Faith Lane in Kiss Kiss Bang Bang (2005), Angie Gennaro in Gone Baby Gone (2007), Violet in Pixels (2015), Jessica Morgan in The Family Plan (2023), Bonnie Witt in Bad Monkey (2024-)

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The Whisper Man Cast: Adam Scott as Tom Kennedy

Character Profile: Peter’s estranged son. He is a novelist whose son disappears. Tom thinks about his late wife while investigating a serial killer.

Scott’s Resume: Derek in Step Brothers (2008), Ben Wyatt in Parks and Recreation (2010-15), Ted Hendricks in The Secret Life of Walter Mitty (2013), Ed Mackenzie in Big Little Lies (2017-19), Mark Scout in Severance (2022-)

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The Whisper Man Cast: Michael Keaton as Frank Carter

Character Profile: An incarcerated serial killer. He is known for for taunting the family members of his victims. Frank denies any involvement with a copycat serial killer.

Keaton’s Resume: Betelgeuse in Beetlejuice (1988), Batman/Bruce Wayne in Batman (1989), Riggan in Birdman or (The Unexpected Virtue of Ignorance) (2014), Walter “Robby” Robinson in Spotlight (2015), Dr. Samuel Finnix in Dopesick (2021)

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The Whisper Man Cast: Owen Teague as Francis Carter Jr.

Character Profile: Frank’s son. He is a troubled young man who mythologizes his father. Francis lives in the home of his childhood therapist and hides a dark secret.

Teague’s Resume: Nolan Rayburn in Bloodline (2015-17), Trick in Black Mirror (2017), Patrick Hockstetter in It (2017), Harold Lauder in The Stand (2020-21), James in To Leslie (2022)

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The Whisper Man Cast: Hamish Linklater as Norman Collins

Character Profile: A collector of serial killer memorabilia. He becomes a person of a interest after visiting Frank in prison. Norman denies any involvement with a copycat serial killer.

Linklater’s Resume: Leonard in Fantastic Four (2005), Matthew Kimble in The New Adventures of Old Christine (2006-10), Porter Collins in The Big Short (2015), Clark in Legion (2017-19), Father Paul in Midnight Mass (2021)

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The Whisper Man cast also includes:

• Acston Luca Porto as Jake Kennedy
• Will Brill as Sgt. John Dyson
• Aniela Zeig as Little Girl
• Exavier Montanez as Neil Spencer
• Randy Danson as Mrs. Shearing
• Robert Clohessy as Victor Tyler
• Kimberlee Monroe as Mrs. Shelley
• Alyse Alan Louis as Carter’s Wife

Q.V. Hough (@QVHough) is Vague Visages’ founding editor.