Brad Pitt and Quentin Tarantino clashed on the set of their film Once Upon A Time In Hollywood, according to Bruce Dern, who also starred in the movie.

In an interview with People magazine published on Thursday, the longtime actor – who shared the screen with Pitt in Tarantino’s 2019 film – detailed a heated exchange the pair had while filming.

During the scene where Dern, who plays blind ranch owner George Spahn, is awoken by Pitt’s Cliff Booth, Dern said that Pitt made a move that sparked the spat between him and Tarantino. 

“When Brad Pitt wakes me up in Once Upon A Time In Hollywood’, I’m in the bed and I get up and I’m a little groggy and stuff and I just say, ‘I’m not really sure what’s going on’,” Dern recalled.

“I’m looking at him. [Pitt] cut the camera, [and told the crew to stop recording].”

Dern said Tarantino looked “insanely grave” before asking Pitt, “what did you just do?”. 

He continyed: “[Pitt] said, ‘Well, I cut the camera.’ [Tarantino] said, ‘Never again in your life will you ever cut a camera or you’ll be dead in this business. That’s my domain. Don’t stop behaviour’.

“So then, we went on and did the scene, and all Brad did was say to him, ‘Well, that wasn’t in the script what he said’.”

After the crew continued filming, Dern improvised a new line: “I don’t know who you are, but you touched me today. You came to visit me, now I gotta go back to sleep.”

Both Pitt and Dern have both worked with Tarantino before.

Pitt won an Oscar for his performance in Once Upon A Time In Hollywood, having also starred in Tarantino’s Inglourious Basterds in 2009 and appeared briefly in Tony Scott’s 1993 True Romance, which Tarantino wrote. 

Dern previously appeared in Tarantino’s Django Unchained in 2012, as well as The Hateful Eight in 2015. 

Reps for Pitt and Tarantino didn’t immediately respond to HuffPost’s requests for comment. 

Coming up, Pitt is set to reprise his Cliff Booth character in a Netflix spin-off to Once Upon A Time In Hollywood, written by Tarantino and directed by David Fincher.

The Adventures Of Cliff Booth will premiere on Netflix on 23 December. Watch a trailer for the movie below: