Matt Damon cut a fine figure when he was seen filming Christopher Nolan Oppenheimer’s upcoming drama in New Jersey for the first time on Thursday.

The actor, 51, sported a bold mustache and brown 1950s military attire as he played his character Lt. Gen. Leslie Groves for the highly anticipated biopic about scientist Julius Robert Oppenheimer.

His military costume consisted of a beige shirt and tie, gray trousers, an elegant dark green jacket decorated with military insignia, and a brown military cap.

Matt shot scenes on the campus of Princeton University on Thursday, where the titular character Oppenheimer lived and served as the third director of Princeton’s Institute for Advanced Study.

Lt. Gen. Groves, who Matt plays in the film, was an engineer who oversaw the construction of the Pentagon and led the top-secret Manhattan Project, which developed the atomic bomb during World War II. Oppenheimer was the director of the laboratory that designed the bombs.

Oppenheimer will feature an incredible all-star cast including Cillian Murphy, Emily Blunt, Kenneth Branagh, Robert Downey Jr, Florence Pugh, Gary Oldman, Rami Malek and Josh Hartnett.

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

Clever: The actor, 51, sported a bold mustache and brown 1950s military attire as he played his Lt. Gen. Leslie Groves character for the highly anticipated biopic

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

Peaky Blinders star Cillian will play the titular character, legendary scientist J. Robert Oppenheimer, known as the father of the atomic bomb.

Cillian has cultivated a long relationship with Christopher Nolan, who tends to work with several of her supporting actors on multiple occasions.

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

He was spotted on the Princeton set on Wednesday alongside his co-star Emily Blunt, who was seen in a Kitty Oppenheimer costume.

Biopic: Matt shot scenes on the campus of Princeton University on Thursday as real-life scientist J. Robert Oppenheimer, whose life is based on the film, lived in the city

A Quiet Place star was previously spotted on set in March, but she doesn’t appear to have been seen working on the film since then.

She plays Kitty, the wife of J. Robert Oppenheimer, whom he married in 1940.

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

She first 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, of which Robert was the director.

Significant: Cillian (pictured in March 2020) steps into the titular role of Julius Robert Oppenheimer (pictured right in 1967) who was an American theoretical physicist

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

On Tuesday, Robert Downey Jr. was seen on set playing former US Commerce Secretary Lewis Strauss.

Nolan, who is a stickler for celluloid and has been content to use film rather than switching to digital photography, seemed to shoot his scenes on 65mm film.

The format which is considerably larger than 35mm film and offers a much sharper image and better color representation than the more traditional format.

Oppenheimer is set for release on July 21, 2023 from Universal Pictures.

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