Christopher Nolan's upcoming film "Oppenheimer" has generated considerable excitement among fans following the release of a new trailer on Monday. The preview revealed a star-studded cast portraying the key figures of the Manhattan Project, including Tom Conti as Albert Einstein.

Based on the biographical novel "American Prometheus: The Triumph and Tragedy of J. Robert Oppenheimer," the film focuses on the legacy of J. Robert Oppenheimer (played by Cillian Murphy), often referred to as "the father of the atomic bomb" due to his role in the Manhattan Project, according to Collider. The story follows Oppenheimer and a team of government scientists as they develop nuclear weapons in the early 1940s.

The trailer left a strong impression on viewers, with one Twitter user declaring "Oppenheimer" as the "film of the year already."

Another fan tweeted, "I'm anticipating this film to have one of, if not the most realistic and insane portrayals of an atomic detonation ever in film. I have a feeling many people will walk out of the movie even more aware of the danger of these weapons."

Others expressed faith in Nolan's directorial skills, with one person stating, "If Christopher Nolan directed it, it's bound to be a masterpiece."

Some also predicted that "Oppenheimer" would outperform "Barbie," which is set to be released on the same day. "Barbie shivering," one user commented.

The appearance of Conti's Einstein in the trailer prompted humorous reactions and memes on Twitter.

"Wait, so Einstein was a real person? I thought he was a theoretical physicist," one user joked.

Another quipped, "Nolan resurrected the real Einstein to maintain the realism."

The film boasts an impressive ensemble cast, including Florence Pugh, Emily Blunt, Robert Downey Jr., Matt Damon, Leslie Groves Jr., Rami Malek, Kenneth Branagh, Benny Safdie, Dane DeHaan, Jack Quaid, Matthew Modine, Alden Ehrenreich, Josh Peck, Jason Clarke, David Dastmalchian, Alex Wolff, Gary Oldman, and James D'Arcy.

"Oppenheimer" is set to premiere in theaters worldwide on July 21.