Darren Aronofsky's psychological horror Mother is "the most controversial movie since A Clockwork Orange" and will "upset the f**k out of people", according to first reactions.
The film, which stars Jennifer Lawrence, Javier Bardem, Michelle Pfeiffer and Ed Harris, follows a couple whose tranquil existence is disturbed by the arrival of uninvited guests at their home.
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Aronofsky personally screened the film for a select group of people ahead of critical screenings this week and their responses have been dramatic.
"It is dark, dark, dark, brilliant and will upset the f**k out of people. A good poke in eye to convention," tweeted renowned chef, author and TV personality Anthony Bourdain.
Horror writer Mylo Carbia called the screening a "life-changing experience", saying Mother "pushes the envelope in ways you can't even imagine".
Lawrence recently confirmed she is dating Aronofsky, whose previous films include Black Swan, Requiem for a Dream and Noah.
Mother is set for release in New Zealand on September 14.