Christopher Nolan's Oppenheimer will reportedly be a record-breaker for the director who has famously made some long movies over the years.

The acclaimed director will soon make his post-pandemic return to theaters with Oppenheimer - a biopic exploring the Manhattan Project and the life of Robert Oppenheimer (Cillian Murphy), known to many as the father of the atomic bomb.

The first trailer for the July release recently debuted in front of IMAX screenings of Avatar: The Way of Water, showing off its stacked cast of all-star actors.

Oppenheimer Runtime Revealed

Oppenheimer

According to the latest "What I'm Hearing" newsletter from Puck's Matt Belloni, Christopher Nolan's next movie Oppenheimer will break the director's record for his longest movie yet.

That record was previously held by 2014's Interstellar at a shocking 169 minutes (2 hours, 49 minutes). But Nolan's new nuclear blockbuster will reportedly surpass it, clocking in at around the three-hour mark.

However, it should be noted that Oppenheimer does not yet seem to be locked, so, pending any last-minute adjustments from Nolan and co., that three-hour runtime may go up or down slightly.

A full list of Nolan's wildly-varied movie runtimes up until now can be seen below:

Following - 70 minutes
Memento - 113 minutes
Insomnia - 118 minutes
Batman Begins - 140 minutes
The Prestige - 130 minutes
The Dark Knight - 152 minutes
Inception - 148 minutes
The Dark Knight Rises - 165 minutes
Interstellar - 169 minutes
Dunkirk - 106 minutes
Tenet - 150 minutes

Nolan will need the extra time on this go-around to explore his stacked cast that includes Iron Man's Robert Downey Jr., Cillian Murphy, Florence Pugh, Matt Damon, Emily Blunt, Rami Malek, and countless more Hollywood A-listers.

Why Oppenheimer Needs To Be 3 Hours

With regard to why Oppenheimer is so long, Nolan already explained that the movie will span 45 years, and with such a huge cast on board, the director has a lot to explore this time around, clearly justifying a three-hour runtime.

Audiences have become increasingly enamored with runtimes in recent years when it comes to both movies and television. Generally, the consensus seems to be that longer movies and episodes are preferable.

But at the same time, director James Cameron recently had to defend the long runtime of Avatar: The Way of Water, pointing out how audiences will happily binge-watch eight hours of TV but complain about a movie being even three hours.

Then again, the complaints about movies being too long are usually pointed more toward those with family target audiences that are likely to have children with short attention spans watching, but that probably isn't Oppenheimer.

Nolan's nuclear thriller has yet to receive an age rating, but given the intense subject matter, this probably won't be one to target the younger audience, at least not for the most part.

Oppenheimer hits theaters on July 21, 2023.