Oppenheimer Cast And Character Guide

Christopher Nolan’s highly anticipated film, Oppenheimer, is generating immense excitement in the film industry. The movie centres around the life of J. Robert Oppenheimer, a renowned theoretical physicist who played a major role in developing the atomic bomb during the Manhattan Project.

While the political plot itself is enough to garner much attention, the cast of Oppenheimer cannot be overlooked! In fact, the movie is set to feature one of the biggest casts in cinema history. Of course, that means a multitude of characters as well. So, without further ado, let’s plunge into an elaborate Oppenheimer cast and character guide!

Cillian Murphy as J. Robert Oppenheimer

Having worked with Nolan on multiple projects, Cillian Murphy has established a strong creative partnership with the acclaimed director. Audiences will remember Murphy’s memorable performance as Scarecrow in the Dark Knight Trilogy, his role as Robert Fischer in Inception, and his portrayal of the shivering soldier in Dunkirk. Additionally, Murphy has led the highly successful TV series Peaky Blinders and appeared in notable films such as A Quiet Place Part II.


Now, he takes on the role of J. Robert Oppenheimer, the father of the atomic bomb. Murphy’s portrayal delves into the life of Oppenheimer, an American theoretical physicist and professor at the University of California, Berkeley. The film captures various stages of Oppenheimer’s life, including early scenes filmed at the university and sequences that depict his aging process. He’s the wartime head of the Los Alamos Laboratory.

Emily Blunt as Katherine Oppenheimer

Cillian Murphy will share the screen again with actress Emily Blunt, whom he previously worked with in A Quiet Place Part II. Blunt takes on the role of Katherine Oppenheimer, J. Robert Oppenheimer’s wife. Their marriage, which lasted from 1940 until Oppenheimer’s death in 1967, will be explored in this film. Blunt, as Katherine, leads a tumultuous life mirroring the challenges faced by her husband in the post-war era.

emily blunt

Following the end of World War II in 1945, Oppenheimer gained recognition, while Katherine battled her own demons. She struggled with alcoholism and experienced multiple bone fractures from drunken accidents and car crashes.

Matt Damon as Leslie Groves Jr.

In Oppenheimer, the renowned Matt Damon takes on the role of Lieutenant General Leslie Groves Jr., the prime director of the Manhattan Project. Damon previously collaborated with Nolan in the 2014 science fiction epic Interstellar. Now, he’ll play another crucial character in Nolan’s latest feature.

Oppenheimer cast matt damon

While some individuals opposed Oppenheimer’s involvement in the research project, Leslie Groves had confidence in the scientist’s leadership abilities at the Los Alamos laboratory. Groves’ belief in Oppenheimer proved to be a stroke of genius, as Oppenheimer’s contributions were instrumental in the project’s success.

Although Groves’ character arc may not be as emotionally investing as that of the Oppenheimers, his role in enabling Oppenheimer’s research remains paramount.

Florence Pugh as Jean Tatlock

Despite it being her first collaboration with Nolan, Florence Pugh has already left a mark in Hollywood with her outstanding performances. From her remarkable role in Midsommar to her portrayal of iconic characters like Amy March in Little Women, Pugh has proven her versatility. Her inclusion in the MCU as Yelena Belova further solidifies her rising star status.

florence pugh

So, who is Jean Tatlock? While Oppenheimer was married to Katherine, he was romantically involved with Jean. He met Tatlock in the 1930s, and their relationship continued during World War II.

Nolan’s biopic will likely delve into Tatlock’s affiliation with the Communist Party, which raises significant security concerns. The complexities of this affair and Tatlock’s impact on Oppenheimer’s personal and professional life will be at the front of the movie.

Robert Downey Jr. as Lewis Strauss

In the movie, Robert Downey Jr. will play Lewis Strauss, who served as the chairman of the U.S. Atomic Energy Commission. Strauss frequently interacted with Oppenheimer, which ultimately led to questions about Oppenheimer’s loyalty to the United States and the cancellation of his security access.

Downey Jr.’s character will serve as an opposing force to Oppenheimer as the story progresses. Early images of Downey Jr. alongside Murphy on set indicate that their characters will have substantial screen time.

Supporting Roles in Oppenheimer

It’s not just big names in the industry that make Oppenheimer. A stellar cast of supporting actors also contributes to the film’s narrative. Let’s delve into the notable supporting roles and the immense potential they bring to this highly anticipated project.

Benny Safdie as Edward Teller

Safdie is the theoretical physicist Edward Teller, known as the “father of the hydrogen bomb.” Teller is best recognized for his contributions to the development of the hydrogen bomb, his role in the Manhattan Project during World War II, and his advocacy for nuclear energy and national defense.

Benny Safdie Oppenheimer

Dylan Arnold as Frank Oppenheimer

Dylan Arnold of After portrays Frank Oppenheimer, J. Robert Oppenheimer’s younger brother, who was also a physicist. He worked on the Manhattan Project during World War II, where he played a role in developing the atomic bomb. However, unlike his brother, he did not continue to work on nuclear weapons after the war.


Michael Angarano as Robert Serber

Angarano plays the role of Robert Serber, a member of the Manhattan Project. He worked closely with J. Robert Oppenheimer, who led the scientific effort. Serber played a vital role in the project as the head of the Project’s theoretical division, responsible for the theoretical aspects of bomb design and assembly.

oppenheimer cast

Emma Dumont as Jackie Oppenheimer

Dumont is seen as Jackie Oppenheimer, a UC Berkeley economics student, Communist Party member, and the wife of Frank Oppenheimer. Dumont’s most notable role as an actor comes from portraying Lorna Dane/Polaris in the series The Gifted, which drew inspiration from the X-Men universe.

Emma Dumont as Jackie Oppenheimer

Gustaf Skarsgard as Hans Bethe

Skarsgard portrays Hans Bethe, head of the Theoretical Division at the Los Alamos laboratory. Bethe played a significant role in determining the mass of the weapons and developing the method used to drop the bomb on Nagasaki.

Bethe’s work focused on understanding the nuclear reactions that power the sun and other stars. He was awarded the Nobel Prize in Physics in 1967 for his work on the theory of stellar nucleosynthesis.


Danny Deferrari as Enrico Fermi

Deferrari plays Enrico Fermi, another member of the Manhattan Project known as “the architect of the nuclear age.” Fermi created the world’s first nuclear reactor, Chicago Pile-1. He was one of the key figures involved in the Manhattan Project. Fermi’s achievements earned him the Nobel Prize in Physics in 1938.


Josh Peck as Kenneth Bainbridge

Josh Peck takes on the role of Kenneth Bainbridge, who conducted cyclotron research and directed the Manhattan Project’s Trinity nuclear test. This was the first nuclear weapon detonation. He was crucial in organizing and overseeing the Trinity test as part of the Manhattan Project. Bainbridge set up the instrumentation and measurements to evaluate the test’s success.

Josh Peck

Devon Bostick as Seth Neddermeyer

Bostick portrays Seth Neddermeyer, an American physicist and engineer who worked on making the atomic bomb. He is particularly known for inventing and developing the implosion method used in the bomb’s design. Neddermeyer’s contributions to the implosion technique were crucial in achieving a more efficient and reliable design for the bomb.


Gary Oldman as Harry S. Truman

Gary Oldman, known for his roles in Nolan’s Dark Knight trilogy and his Academy Award-winning performance as Winston Churchill in Darkest Hour, takes on the role of Harry S. Truman.

Truman was the 33rd President of the United States, serving from 1945 to 1953. He dropped the atomic bombs on Hiroshima and Nagasaki, effectively ending World War II.

David Krumholtz as Isidor Isaac Rabi

David Krumholtz, primarily known for his comedic roles, takes on the role of Isidor Isaac Rabi in Oppenheimer. Rabi was a physicist who won the Nobel Prize in 1944 for his discovery of nuclear magnetic resonance and magnetic resonance imaging.

David Krumholtz

Christopher Denham as Klaus Fuchs

Christopher Denham joins the cast as Klaus Fuchs, a German theoretical physicist and an atomic spy who worked closely with the Soviet Union during the Manhattan Project.

Denham, known for his roles in historical thrillers like Argo and TV series such as Manhattan and Billions, brings his expertise in the genre to his portrayal of Fuchs.


Tom Conti as Albert Einstein

Tom Conti portrays Albert Einstein in the Oppenheimer cast. Einstein, the renowned theoretical physicist, is famous for his theory of relativity, contributions to quantum mechanics, and close association with Oppenheimer.

Conti, a beloved Scottish actor, has starred in films such as Merry Christmas Mr. Lawrence, Reuben Reuben, and American Dreamer.



Nolan’s bold choices in casting have become a trademark of his filmmaking style. And the cast of Oppenheimer is no exception! From A-listers to rising talents, we are undoubtedly in for a treat. There’s no denying the talented lineup of actors will bring their skills and dedication to breathe life into the real-life characters. With each casting announcement, the excitement surrounding the project grows, and the anticipation for the film’s release reaches new heights. We can’t see what the Oppenheimer cast has in store for us!

The film will release on July 21.

Noor Tariq

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