Leonardo DiCaprio's new movie Killers of the Flower Moon will have a longer runtime than Titanic

He may now be an Oscar winner, but it seems like Leonardo DiCaprio isn’t slowing down any time soon.

In fact, the 48-year-old has just signed on to his biggest movie ever – literally!

DiCaprio is set to star in Martin Scorsese's Killers of the Flower Moon, a crime drama which is set to have pretty big run time.

It's even longer than Titanic.

Apple TV

And that's no mean feat as Titanic is a staggering 3 hours and 15 minutes long, ending with DiCaprio sinking with the ill-fated ship.

However, Killers of the Flower Moon is set to outdo the epic romance as it tells the real-life story of the Osage murders.

For those not familiar with the case, it centres around the Osage people – an indigenous American group who become wealthy after oil was discovered on their Oklahoma land.

As their profit soar though, a murderer begins to target the landowners and it’s estimated that at least 24 lives were lost during the early 1920s.

The highly anticipated film will tell their story and also show how the newly formed FBI struggled to solve the mysterious deaths.

20 Century Fox

Although the film won’t be hitting cinemas until late October, there is already huge hype around the film due to its insane cast and upcoming debut at the Cannes Film Festival.

In addition to DiCaprio, the Wolf of Wall Street star will also be joined by Taxi Driver's Robert De Niro and The Crown's Jon Lithgow, as well as Oscar winner, Brendan Fraser.

Killers of the Flower Moon will also see DiCaprio reunite with his long-time collaborator Scorsese, who will be directing the crime drama.

However, those wanting to see the film on the big screen will have to come prepared as the movie is set to be almost four hours long.

So best time your bathroom breaks accordingly.

And it’s not the first time that Scorsese has tested audiences’ endurance with his insanely long films.

Cinematic Collection / Alamy Stock

Back in 2004, the director released The Aviator, which was about the life of engineer and money magnate, Howard Hughes.

Though the film got off to a flying start, the total run time would rise to a bladder-busting 170 mins – which was two hours and 49 minutes long.

Even more surprisingly though, The Wolf of Wall Street ended up setting its own records, thought not for longest film, but rather for the most amount of swearing in a film.

And it’s quite a task given that the movie is three hours long exactly.

However, nothing has yet to top The Irishman, with the Netflix movie putting Scorsese’s other films to shame by maxing out around three and half-hour mark.

With Killers of the Flower Moon set to be even longer, it’s best to start planning your snacks now.

You have been warned!