Canadian filmmaker Denis Villeneuve says he鈥檚 relieved to see many rave reviews for his sci-fi epic 鈥淒une鈥� on the festival circuit, but the real test will be how it performs in theatres next month.

The highly anticipated adaptation of Frank Herbert鈥檚 1965 novel had a world exclusive IMAX screening at the Toronto International Film Festival on Saturday after its recent premiere in Venice.

The sprawling interstellar story of warring families stars Timoth茅e Chalamet as the protagonist antihero and Rebecca Ferguson as his mother.

Oscar Isaac plays his father, who oversees a dangerous desert planet containing the most valuable item in the universe.

As of Sunday afternoon, 鈥淒une鈥� had an 88 per cent approval rating from critics on movie review aggregation website Rotten Tomatoes.

Villeneuve says he鈥檚 seen the positive reaction but doesn鈥檛 want to celebrate until he hears the box-office results when 鈥淒une鈥� hits Canadian and U.S. theatres on Oct. 22.

鈥淚 know that there are great reviews out there. It鈥檚 a relief in a way,鈥� the Montreal writer-director, whose previous projects include 鈥淎rrival鈥� and 鈥淏lade Runner 2049,鈥� said in an interview Sunday.

鈥淎s much as I鈥檓 happy because of the way the movie has been received so far, I will say that the test will be to see how people are excited enough to go back to the theatre and live the big-screen experience 鈥� what cinema is meant to be.鈥�

The theatrical turnout is doubly important to Villeneuve because he created the film specifically for the IMAX experience and wants audiences to see it on the big screen.

Plus, his vision for the story won鈥檛 be complete if it doesn鈥檛 do well at the box office.

As the director, co-producer and co-writer, Villeneuve split the story in two, with the current film serving as Part 1.

He made an agreement with Warner Bros. that part two won鈥檛 get made unless the first one does well when it hits theatres.

But theatrical turnout may be hampered by concerns over the COVID-19 Delta variant and Warner Bros.鈥� decision to put 鈥淒une鈥� on the HBO Max streaming service in the U.S. the same day it hits theatres.

Still, the story of 鈥淒une鈥� has legions of fans and the adaptation is one of the buzziest films of the year. The hype and anticipation intensified when the film鈥檚 release was delayed several times due to the pandemic.

Its debut on Canadian soil at the Cinesphere IMAX Theatre for TIFF was 鈥渧ery moving,鈥� said Villeneuve, noting the festival 鈥渉as been very good鈥� to him over the years.

鈥淚 need to give a shout-out to all the people who are working at TIFF this year, because it鈥檚 a very tough year for a film festival and these guys are heroes right now, to try to keep TIFF alive in difficult times,鈥� said Villeneuve, who co-wrote the screenplay with Jon Spaihts and Eric Roth.

鈥淭hey have all my gratitude and respect and I feel very privileged to have the chance to screen my movie at this year鈥檚 film festival.鈥�

Villeneuve was especially thrilled with the apt location of the premiere: the Cinesphere IMAX Theatre at Ontario Place, which is shaped as a futuristic-looking dome suspended in water.

鈥淚t鈥檚 the most surreal film theatre on Earth and at the same time it鈥檚 one of the most beautiful ones, but the setting is quite sci-fi,鈥� he said.

鈥淚t鈥檚 very impressive. A sphere in the middle of the water 鈥� how can it be better than that.鈥�

The Toronto film festival runs through Sept. 18 with a mix of online and in-person screenings.

鈥擵ictoria Ahearn, The Canadian Press