Emily Blunt teams her chic vintage blazer and pencil skirt with comfortable UGGs as she takes a break with Cillian Murphy on the LA set of their new film Oppenheimer

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Emily Blunt and Cillian Murphy looked deep in conversation on the set of their upcoming film Oppenheimer in Los Angeles on Thursday. 

Emily, 39, looked chic in a period-appropriate navy blazer and coordinating pencil skirt teamed with UGG boots, whilst Cillian, 45, sported a charcoal suit as they took a walk around set during a break from shooting.  

The film tells the story of theoretical physicist J. Robert Oppenheimer and his contributions that lead to the creation of the atomic bomb. 

On set: Emily Blunt looked sensational in a vintage blazer and pencil skirt whilst Cillian Murphy donned a suit as they filmed for upcoming movie Oppenheimer in Los Angeles on Thursday

On set: Emily Blunt looked sensational in a vintage blazer and pencil skirt whilst Cillian Murphy donned a suit as they filmed for upcoming movie Oppenheimer in Los Angeles on Thursday

Cillian will be taking on the lead role whilst Emily will be starring alongside him as his characters wife, Kitty Oppenheimer.

Emily's brunette locks were pulled back into a very 1950's hairstyle as she added a slick of cherry red lipstick to compete her vintage look. 

The duo could be seen as they walked down the street with Emily clutching on to a drink whilst Cillian flicked through his lines. 

Hard at work: The duo could be seen as they walked down the street with Emily clutching on to a drink whilst Cillian flicked through his lines

Hard at work: The duo could be seen as they walked down the street with Emily clutching on to a drink whilst Cillian flicked through his lines

Kitty was born in Germany in 1910 and immigrated to the United States in 1913.

She initially studied music and biology and was married to two other men before marrying Oppenheimer in 1940.

The couple moved to Los Alamos, New Mexico, shortly after the start of World War II to work on the Manhattan Project, which Robert was the director of.

The research group was responsible for creating the first atomic bombs, and the devastating explosives would later be dropped on the Japanese cities of Hiroshima and Nagasaki later in the war.

Shortly after the bombs were detonated in Hiroshima and Nagasaki Oppenheimer began to lobby for the control of nuclear weapons to avert a nuclear war with Russia.

He was appointed the chairman of the Atomic Energy Commission though he was also a target of the House Un-American Activities Commission as well.

Oppenheimer passed away in 1967 at 62 years of age from throat cancer after years of smoking cigarettes.

In character: Emily's brunette locks were pulled back into a very 1950's hairstyle as she added a slick of cherry red lipstick to compete her vintage look

In character: Emily's brunette locks were pulled back into a very 1950's hairstyle as she added a slick of cherry red lipstick to compete her vintage look 

Oppenheimer, which reportedly has a budget of $100million, is directed by Christopher Nolan.

Cillian has cultivated a long relationship with Nolan, who tends to work with many of his supporting actors repeatedly.

The two first worked together on 2005's Batman Begins, and Murphy appeared in its sequels The Dark Knight and The Dark Night Rises, along with Inception and Dunkirk.

Having started production in late February, Nolan is expected to take more than five months to shoot, which if he keeps on schedule it would go until the beginning of August.

Oppenheimer is the first film to shoot in IMAX black-and-white analog photography, although its not known whether it will be done entirely in black and white

Telling the tale: The film will be adapted from the 2006 book American Prometheus: The Triumph and Tragedy of J. Robert Oppenheimer
J. Robert Oppenheimer (pictured right in 1963)

New role: Cillian (left) will be taking on the lead role of J. Robert Oppenheimer (pictured right in 1963) 

At work: Robert (Pictured in 1945) was part of the research group was responsible for creating the first atomic bombs, and the devastating explosives used in World War II

At work: Robert (Pictured in 1945) was part of the research group was responsible for creating the first atomic bombs, and the devastating explosives used in World War II

Oppenheimer will feature an incredible all-star cast including that also features Kenneth Branagh, Robert Downey Jr, Matt Damon, Gary Oldman, Rami Malek, Josh Hartnett and many more.

Damon plays Lieutenant General Leslie Richard Groves Jr, a United States Army Corps of Engineers officer who oversaw the construction of the Pentagon and directed the Manhattan Project.

Hartnett portrays Ernest Lawrence, who's among the scientists who worked on the Manhattan Project.

The pioneering American nuclear physicist won the Nobel Prize in Physics in 1939 for his invention of the cyclotron, which is a particle accelerator.

Starring role: Emily plays Kitty was born in Germany in 1910 and immigrated to the United States in 1913
Kitty initially studied music and biology and was married to two other men before marrying Oppenheimer in 1940

Starring role: Emily plays Kitty (pictured right) was born in Germany in 1910 and immigrated to the United States in 1913. She initially studied music and biology and was married to two other men before marrying Oppenheimer in 1940

True story: The film tells the story of Dr. J. Robert Oppenheimer and his contributions that lead to the creation of the atomic bomb (Pictured left at Trinity Test Site in 1945)

True story: The film tells the story of Dr. J. Robert Oppenheimer and his contributions that lead to the creation of the atomic bomb (Pictured left at Trinity Test Site in 1945)

All star cast: Matt Damon (pictured on set last month) plays Lieutenant General Leslie Groves in the much-anticipated biopic
Real life: Groves (pictured in the 1940s) oversaw the construction of the Pentagon and directed the top secret Manhattan Project, which developed the atomic bomb during World War Two. Oppenheimer was the director of the laboratory that designed the bombs

Smart: Matt Damon (pictured on set last month) plays Lieutenant General Leslie Groves in the much-anticipated biopic

Going back in time: Robert Downey Jr (pictured April 2018) is portraying Lewis Strauss (pictured right in 1954) who served two terms on the U.S. Atomic Energy Commission
Pivotal: Lewis was a major figure in the development of nuclear weapons

Going back in time: Robert Downey Jr (pictured April 2018) joins the cast as he is portraying Lewis Strauss (pictured right in 1954) who served two terms on the US Atomic Energy Commission

Cast: Josh Peck (pictured on set) plays American physicist Kenneth Bainbridge
Bainbridge was the director of the Manhattan Project's Trinity nuclear test during the development of the first atomic weapons

Cast: Josh Peck (pictured left on set) plays American physicist Kenneth Bainbridge, the director of the Manhattan Project's Trinity nuclear test during the development of the first atomic weapons

Lawrence would go on to be recognized for his work on uranium-isotope separation for the Manhattan Project.

Josh Peck plays American physicist Kenneth Bainbridge, the director of the Manhattan Project's Trinity nuclear test during the development of the first atomic weapons.

The film is being adapted adapted from the 2006 book American Prometheus: The Triumph And Tragedy Of J. Robert Oppenheimer, by Kai Bird and Martin J. Sherwin.

The book, which won the Pulitzer Prize, details Oppenheimer's personal life and his time leading the Manhattan Project in the early and mid-1940s.

Oppenheimer is set to be released on July 21, 2023, by Universal Pictures.

The current debut date is slated to come about two weeks before the harrowing anniversaries of the atomic bombs that were dropped on Hiroshima and Nagasaki, which happened on August 6 and August 9 in 1945. 

What was the Manhattan Project? 

A photo taken four seconds after Gadget's detonation showing the tremendous fireball erupting in the early morning sky, proving the Manhattan Project a success

A photo taken four seconds after Gadget's detonation showing the tremendous fireball erupting in the early morning sky, proving the Manhattan Project a success

A joint effort between the U.S., the UK and Canada, the Manhattan Project was a research and development program that produced the first atomic bomb during the Second World War.

It began in 1939 as a modest operation, but grew to involve more than 130,000 people costing about $2billion working across 30 sites in America, Britain and Canada - some of them top secret.

The first-ever nuclear device was detonated in New Mexico on July 16 1945. Less than a month later it was unleashed on unsuspecting Japan.

On August 6, 1945, the United States dropped a massive atomic bomb on Hiroshima. 

Three days later, another atomic bomb was dropped on Nagasaki, which killed about 70,000 people.

President Harry Truman (center) presenting chemist Dr. James Conant with the Medal of Merit and Bronze Oak Leaf Cluster. Dr. Vannevar Bush (left), who played critical leadership roles in the Manhattan Project which developed the Atomic Bomb

President Harry Truman (center) presenting chemist Dr. James Conant with the Medal of Merit and Bronze Oak Leaf Cluster. Dr. Vannevar Bush (left), who played critical leadership roles in the Manhattan Project which developed the Atomic Bomb

The genesis of the Manhattan Project began in 1938 when German scientists Otto Hahn and Fritz Strassmann inadvertently discovered nuclear fission. 

A few months later, Albert Einstein and Leo Szilard sent a letter to President Roosevelt, warning him that Germany might try to build an atomic bomb. 

In response, FDR formed the Uranium Committee, a group of top military and scientific experts to determine the feasibility of a nuclear chain reaction.

Funding first came in December 1942, when Roosevelt ordered an initial $500 million. The headquarters of the project was then moved from Manhattan to Washington DC, while other project sites were across the country. 

The weapons research laboratory was located Los Alamos, New Mexico, and would conduct most of the remaining research and construction of the A-bomb.

Workers laying up the graphite core of the Reactor-B atomic pile as part of the project. The pile was 36 feet high, measuring 28 by 36 feet. It was penetrated horizontally by 2,004 fuel tubes and vertically by channels for the vertical safety rods

Workers laying up the graphite core of the Reactor-B atomic pile as part of the project. The pile was 36 feet high, measuring 28 by 36 feet. It was penetrated horizontally by 2,004 fuel tubes and vertically by channels for the vertical safety rods

Physicists, chemists, metallurgists, explosive experts and military personnel converged on the secret town, which grew to be the home of thousands of project workers. 

The Army was charged with supplying, supporting and guarding the top-secret work being carried out at the site.

Physicist Norris Bradbury was in charge of the final assembly of atomic device, known as the Gadget. 

Fellow physicist Seth Neddermeyer alongside George Kistiakowsky co-lead the design of the implosion-style Plutonium atomic bomb. 

Chemist Dr. James Conant and engineer Dr. Vannevar Bush played critical leadership roles in the Manhattan Project and were awarded the Medal of Merit and Bronze Oak Leaf Cluster after the war.

The first nuclear device ever detonated was an implosion-type bomb at the Trinity test at the Alamogordo Bombing and Gunnery Range in New Mexico on July 16, 1945.

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Emily Blunt dons a vintage blazer and pencil skirt with Cillian Murphy on the set of Oppenheimer

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