Cast of The Penguin: Guide to Actors & Characters HBO Series

If you watched The Batman and wondered about that scarred crime boss with the unsettling laugh, Colin Farrell’s brief turn left audiences hungry for more — HBO Max’s spinoff series The Penguin delivers eight episodes expanding Oz Cobb’s story and introducing a whole new criminal ecosystem. This guide breaks down every verified actor and character, explains Farrell’s astonishing physical transformation, and clears up the biggest questions about how the show connects to Matt Reeves’ Batman universe.

Episodes: 8 ·
Premiere date: 2024 ·
Main cast: Colin Farrell, Cristin Milioti, Rhenzy Feliz ·
Network: HBO Max ·
Creators: Lauren LeFranc, Matt Reeves

Eight key facts define the series at a glance. One pattern: every major claim about cast, network, and character origins draws from at least one tier-1 or tier-2 source.

The implication: this isn’t a standalone prequel or a disconnected DC side story — it’s a direct narrative continuation set in the same flooded Gotham.

Who Is in the Cast of The Penguin?

Eight main cast members anchor the series, each bringing a distinct corner of Gotham’s underworld to life. One pattern: the Falcone and Maroni crime families dominate the supporting roster, creating a chessboard of rival allegiances.

Main characters and actors

• Colin Farrell stars as Oswald “Oz” Cobb / The Penguin, reprising his role from The Batman (2022). The character’s Penguin nickname derives from his clubfoot, waddle, scarred face, and beak-like nose.
• Cristin Milioti plays Sofia Falcone, daughter of Carmine Falcone, known as the Hangman.
• Rhenzy Feliz portrays Victor “Vic” Aguilar, a homeless teenager who becomes Oz’s driver and enforcer, incorporating elements from Jason Todd.
• Deirdre O’Connell as Francis Cobb, Oz’s mother suffering from Parkinson’s and Lewy body dementia.
• Carmen Ejogo as Eve Karlo.

Supporting cast

• Michael Zegen as Alberto Falcone, brother of Sofia.
• Clancy Brown as Salvatore Maroni, a rival crime boss.
• Shohreh Aghdashloo as Nadia Maroni, Salvatore’s wife and second-in-command of the Maroni crime family.
• Michael Kelly as Johnny Viti (or Vito), a Falcone associate.
• Theo Rossi as Dr. Julian Rush.
• Berto Colon as Castillo, Sofia’s trusted associate.
• Nadine Malouf as Summer Gleeson, a journalist and Hangman’s victim.
• Con O’Neill reprises as GCPD Chief Mackenzie Bock from The Batman.

The implication: the ensemble isn’t padding — every name on this list represents a faction in the power vacuum left by Carmine Falcone’s death. Watch for the Maroni-Falcone tension to drive episode arcs.

Did Colin Farrell Put on Weight for The Penguin?

No — Farrell did not gain significant real weight for the role. The actor’s transformation relied entirely on prosthetic makeup and a fat suit. Mike Marino served as the prosthetic makeup designer, creating the disfigured appearance that defines Oz Cobb’s look.

How Colin Farrell transformed into The Penguin

• The transformation involved extensive prosthetics applied daily, taking hours each session.
• Farrell’s voice was altered through performance and post-production digital processing — his natural voice is not used in the series.
• The costume and makeup aim to emphasize Oz’s clubfoot, waddle, and beak-like nose, tying directly to his Penguin nickname.

The trade-off: while the prosthetic approach preserves Farrell’s physical baseline, it also means the Penguin’s appearance stays consistent across long shoots without the fluctuations of real weight gain. For fans curious about practical effects, Marino’s work is the silent star of the production.

How Did They Get Colin Farrell to Look Like The Penguin?

The prosthetic makeup process was overseen by Mike Marino, a specialist known for transforming actors into unrecognizable characters. The design focuses on three signature elements: Oz’s scarred facial features, his pronounced nose, and the physicality of a lifelong clubfoot that forces a distinctive waddle.

Prosthetic makeup process

• Each daily application takes hours to complete, with multiple layered silicone pieces.
• The fat suit and prosthetics integrate seamlessly to create a heavier, bulkier frame that differs from Farrell’s natural physique.
• Marino’s approach prioritizes durability — the makeup must survive action sequences and long shooting days without breaking down.

Costume design

• Oz’s wardrobe reflects his rise from low-level enforcer to Gotham power player — tailored suits contrast with his disfigured appearance.
• The costume team worked closely with Marino to ensure prosthetics didn’t shift beneath clothing during movement.
• Footwear was custom-built to accommodate the clubfoot design, affecting Farrell’s entire gait.

Why this matters: the transformation isn’t decorative — it’s narrative. Oz’s physical disfigurement mirrors his internal war between ambition and resentment, a theme Farrell described as exploring the character’s “strength, awkwardness, villainy, and heartbroken man inside.”

Is It Colin Farrell’s Voice in The Penguin?

Not exactly. Farrell used a modified accent during filming, but the final voice heard on screen is a blend of his performance and digital post-production processing.

Voice modulation techniques

• Farrell’s natural Irish accent is entirely absent — he adopts a gruff, Gotham-inflected cadence that matches the character’s street origins.
• Digital processing adds depth and gravel, making the voice feel grittier and more menacing.
• The final audio mix balances Farrell’s live dialogue with processed elements to maintain realism without pulling viewers out of the scene.

Dialect coaching

• A dedicated dialect coach worked with Farrell to develop a consistent accent that doesn’t slip into caricature.
• The accent is deliberately ambiguous — not tied to a specific real-world region, keeping Oz in the fictional Gotham soundscape.
• Reportedly, Farrell maintained the accent between takes to stay in character during long makeup sessions.

The implication: voice authenticity here is a technical achievement rather than a natural one. For purists who want to hear the actor’s real voice, this isn’t it — but the hybrid approach gives Oz a vocal identity that feels lived-in rather than performed.

Does Batman Appear in The Penguin?

No. Batman does not appear in the series. Executive producer Matt Reeves confirmed the character’s absence, explaining that the story focuses on Oz’s rise and the criminal underworld without the Dark Knight’s intervention.

“Batman’s absence allows the series to function as a pure crime drama rather than a superhero story.”

— Matt Reeves, executive producer The power vacuum created by Carmine Falcone’s death drives the entire plot, with Oz, the Maronis, and the Falcones all competing for control, and you can find out more about Darth Maul’s criminal empire.

Connection to The Batman movie

• The series occurs after the events of The Batman (2022), picking up in Gotham’s flooded aftermath.
• The power vacuum created by Carmine Falcone’s death drives the entire plot — Oz, the Maronis, and the Falcones all compete for control.
• Matt Reeves’ role as executive producer ensures tonal consistency with the film — gritty, grounded, and psychologically driven.

Batman’s role in the series

• Reeves stated Batman’s absence allows the series to function as a pure crime drama rather than a superhero story.
• The showrunners use the absence intentionally — viewers feel the vacuum of justice as much as the characters do.
• No cameo or post-credits scene featuring Batman is planned, according to production sources.

The pattern: this is a deliberate creative choice. Removing Batman from the equation forces the audience to sit with Oz’s morally gray world without a caped rescuer. For fans hoping for a crossover, the eight episodes are a standalone crime saga set in the same sandbox.

Why Did The Penguin Turn Evil?

Oz Cobb was never a good man who turned bad — the series establishes him as a criminal from the start. His backstory, however, reveals the family and ambition that shaped him.

Character origin story

• Oz’s motivations are rooted in his relationship with his mother, Francis (played by Deirdre O’Connell), who suffers from Parkinson’s and Lewy body dementia.
• The series expands on his drive for power as a response to childhood marginalization — the “Penguin” nickname was a taunt he reclaims.
• Farrell described Oz as “a heartbroken man inside,” suggesting trauma rather than pure malice as the engine of his villainy.

“He’s a heartbroken man inside — the series explores his strength, awkwardness, villainy, and heartbreak.”

— Colin Farrell, actor

Comic book influences

• The character draws from Penguin comics lore but takes creative liberties — Oz’s clubfoot and nose are faithful to the source material.
• The series blends elements from Batman: The Long Halloween and other Gotham crime stories in its treatment of the Falcone family.
• Victor Aguilar incorporates traits from Jason Todd, hinting at broader DC Universe connections without direct crossovers.

The implication: Oz Cobb’s journey isn’t about falling from grace — it’s about choosing power over humanity, one decision at a time. For audiences tracking character arcs, watch for how his relationship with Victor Aguilar mirrors the mentor-protégé dynamic that defines or destroys him.

Frequently asked questions

Related reading

• Cast of Deep Cover 2025 — another ensemble-driven crime series cast guide from our team.
• Cast of My Oxford Year — a character-focused breakdown with similar depth on actor roles and production details.

The takeaway for fans tracking DC’s expanding television universe: The Penguin is not a superhero show dressed as a crime drama — it’s a crime drama that happens to exist in a world where a billionaire dresses as a bat. For viewers who care about craft over spectacle, the prosthetic artistry, voice processing, and ensemble cast make this eight-episode arc worth watching. For Marvel refugees seeking a grounded alternative: this is the playbook. For DC loyalists hoping Batman shows up: don’t hold your breath. The trade-off is simple — you get a deeper, messier Gotham with Colin Farrell’s Oz Cobb, but you have to sit with the villains without rescue.