AceShowbiz -

Alfonso Cuaron's "Gravity" once again gets the honor to open another prestigious event. After the Venice Film Festival, where it debuted to rave reviews, the sci-fi movie starring Sandra Bullock and George Clooney has been tapped to kick off Mexico's Morelia International Film Festival, which runs October 18-27.

Before heading to Mexico, "Gravity" will first be screened as a Special Presentation at the Toronto Film Festival. Judging from the ecstatic reaction it received at Venice as well as Telluride on Saturday, August 31, many predict that the pic from Warner Bros. will be an awards contender.

"This film was a big act of miscalculation. That's why it took four-and-a-half years to make," says Cuaron, who worked on the script with his son Jonas, to The Wrap. "The problem was, it very soon became clear that the technology to do the film didn't exist. So we had to invent new technology."

"Gravity" follows a brilliant medical engineer who gets stranded in space with a veteran astronaut when their spacewalk is interrupted by their shuttle's unexpected destruction.

When promoting the film in Venice, Bullock, who spent most of her time in a 9-by-9-foot cube during the filming, called it "physically and mentally, the craziest, most bizarre, challenging thing" she had ever done.

Clooney, meanwhile, said that "moving slowly to mimic the way the body moves in space while speaking normally" was the biggest challenge he faced.