Oscar-winning director Martin Scorsese has lashed out at the Marvel Cinematic Universe, declaring they're frivolous.
Scorsese, known for films such as The Departed, Goodfellas and Raging Bull, told Empire the Marvel superhero movies are more like theme parks.
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"I don't see them. I tried, you know? But that's not cinema," Scorsese told Empire.
"Honestly, the closest I can think of them, as well made as they are, with actors doing the best they can under the circumstances, is theme parks. It isn't the cinema of human beings trying to convey emotional, psychological experiences to another human being."
But he's angered Marvel director James Gunn, who has helmed the Guardians of the Galaxy movies for the comic book behemoth.
"Martin Scorsese is one of my five favourite living filmmakers. I was outraged when people picketed The Last Temptation of Christ without having seen the film. I'm saddened that he's now judging my films in the same way," Gunn wrote on Twitter.
"That said, I will always love Scorsese, be grateful for his contribution to cinema, and can't wait to see The Irishman."
Scorsese's latest film, The Irishman, premiered on September 27 and will have a limited theatrical release from on November 1, before dropping on Netflix on November 27.
It's received widespread critical acclaim. Indiewire reports it's a contender for several Academy Awards.