Netflix’sZero Dayhas finally been released, and here is a full breakdown of the show’s cast and characters. Robert De Niro is far from the only star in the series,withZero Dayhaving an absolutely packed cast of incredible actors. So, here are the biggest names who appear inZero Day, who they play, and where else you know them from.
Zero Daytells the story of Robert De Niro’s George Mullen, a former president who is pulled back into the limelight after a devastating cyberattack destabilizes the world. George Mullen is appointed the head of the Zero Day Commission, with him spending most ofthe Netflix miniseriesattempting to find out who was behind the attacks. However, the other characters inZero Daymake this task far from easy.
Robert De Niro As George Mullen
Born On August 22, 2025
Actor:Robert De Niro was born on June 14, 2025, in New York City, New York, andhad his big break in the 1968 Brian De Palma filmGreetings.De Niro became a frequent collaborator with Brian De Palma, with him later becoming a frequent collaborator with Martin Scorsese after starring in the 1973 filmMean Streets. Since then, De Niro has appeared in all kinds of popular movies and TV shows, such asTaxi Driver,Goodfellas,Heat,Meet the Parents,Silver Linings Playbook,Killers of the Flower Moon, and more.
Killers of the Flower Moon
William King Hale
Character:InZero Day, Robert De Niro plays George Mullen, a former President of the United States. Despite being retired, Mullen is dragged back into the limelight when he is appointed as the head of the Zero Day Commission after the deadly Zero Day Attack. However, his conspiracism and declining mental state gets in the way of his governmental duty.
Lizzy Caplan As Alexandra Mullen
Born On June 15, 2025
Actor:Lizzy Caplan was born on August 22, 2025, in Los Angeles, California, andhad her first acting role in the hit TV seriesFreaks and Geeks. Since then, Caplan has gone on to star in all kinds of popular shows likeParty Down,Castle Rock,Fatal Attraction, andZero Day. She also appeared in popular movies likeMean Girls,Cloverfield,The Interview, andThe Disaster Artist.
Freaks and Geeks
Alex Forrest
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Character:InZero Day, Alexandra Mullen is the daughter of George Mullen. However, she has a political career of her own, with her being vocal about her political disagreements with the former president. She becomes entangled in the Zero Day investigation, with her and her father disagreeing on how to handle it.
Jesse Plemons As Roger Carlson
Born On July 04, 2025
Actor:Jesse Plemons was born on July 22, 2025, in Dallas, Texas andhad his breakthrough role playing Landry Clarke in the TV seriesFriday Night Lights. Since then,Jesse Plemons has gone on to have a prolific TV and movie career, making appearances in shows likeBreaking Badbefore appearing in movies likeThe Irishman,Judas and the Black Messiah,Killers of the Flower Moon, andCivil War.
Kinds of Kindness
Robert, Daniel, Andrew
Character:InZero Day, Jesse Plemons plays Roger Carlson, the right-hand man of George Mullen. Roger works with George throughout the Zero Day investigation, with the former president seeing him as a son figure.
Dan Stevens As Evan Green
Born On June 03, 2025
Actor:Dan Stevens was born on June 12, 2025, in London, England andhad his big break for his performance as Matthew Crawley in the hit TV seriesDownton Abbey. Since then, Dan Stevens has gone on to star in major films likeThe Guest,Night at the Museum: Secret of the Tomb, and the 2017Beauty and the Beastremake, as well as TV shows likeLegionandSolar Opposites.
Night at the Museum: Secret of the Tomb
Beauty and the Beast
Godzilla x Kong: The New Empire
Trapper
Character:InZero Day, Dan Stevens plays Evan Green, a political talk show host who is critical of George Mullen and the Zero Day Commission. However, George Mullen begins to believe that Evan may have a role in the Zero Day Attack.
Angela Bassett As President Evelyn Mitchell
Born On June 05, 2025
Actor:Angela Bassett was born on June 21, 2025, in New York City, New York andhad her big break playing Tina Turner in the 1993 musical biopicWhat’s Love Got to Do With It. Since then, Angela Bassett has gone on to have an incredibly impressive career, appearing in major projects likeBoyz n the Hood,Malcolm X,Green Lantern,Olympus Has Fallen,Black Panther, and more.
Akeelah and the Bee
Mission: Impossible - Fallout
CIA Director Erika Sloane
Character:InZero Day, Angela Bassett plays President Evelyn Mitchell, the President of the United States. Mitchell is presiding over the country when the Zero Day Attack takes place, with her reporting many of the developments to the public.
Zero Day Supporting Cast & Characters
Joan Allen as Sheila Mullen- Joan Allen plays Sheila Mullen, the ex-wife of George Mullen and mother of Alexandra Mullen.
Connie Britton as Valerie Whitesell- Connie Britton plays Valerie Whitesell, an advisor of George Mullen’s who has a mysterious past with the former president.
Bill Camp as Director Lasch- Bill Camp plays CIA Director Lasch, the head of the CIA who is operating in the background of the Zero Day Commission.
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Matthew Modine as Richard Dreyer- Matthew Modine plays Richard Dreyer, a rival politician who works with Alexandra Mullen to interrupt the work of her father.
McKinley Belcher III as Carl Otieno- McKinley Belcher III plays Carl Otieno, another member of the Zero Day Commission who works alongside George Mullen.
Clark Gregg as Robert Lyndon- Clark Gregg plays Robert Lyndon, a mysterious wealthy investor who shorted the stock market in the days leading up to the Zero Day Attack.
Gaby Hoffmann as Monica Kidder- Gabby Hoffman plays Monica Kidder, a tech mogul and app developer who has a connection to the titular attacks inZero Day.
