The film, an adaptation of the Broadway production, stars Tony Award-winner Ben Platt reprising his role as a high school student with social anxiety who gets caught up in a lie. Julianne Moore, Amy Adams and Kaitlyn Dever are among the cast.

“I love the story very deeply. It’s been very close to my heart for many years, so the fact that it’s going to be on such a large platform and seen by so many is really an exciting gift,” Platt told reporters on the red carpet.

Platt, 27, said he has had his own struggles with anxiety and had tried to make the character “as human and connected” as possible.

Moore, who plays Evan Hansen’s mother, said she has been a fan of the stage musical for years. “So to suddenly find myself in the middle of this story – how lucky I was as an actor,” she said.

The Toronto festival will be a mix of in-person and digital events, screening almost 200 films over 10 days.

Other premieres include “The Eyes of Tammy Faye,” starring Jessica Chastain as the flamboyant United States televangelist; documentaries about singers Dionne Warwick and Alanis Morissette; and films starring Jake Gyllenhaal, Keira Knightley and Melissa McCarthy.

Warwick, Chastain, British actor Benedict Cumberbatch and “Dune” director Denis Villeneuve are among those who will receive honorary awards.

The Toronto festival has traditionally been seen as a showcase for movies that go on to win Oscars, including this year’s best picture winner, “Nomadland”.

Last year’s event was scaled back dramatically, but while film festivals in Cannes and Venice this year had exclusively physical events, Toronto organisers said months ago that they would move forward with a hybrid model.

Films will be shown online and outdoors with some screenings in cinemas before limited-capacity audiences. Attendees must provide proof of Covid vaccination or a negative test before entering a physical venue.

Canada only recently reopened its borders to fully vaccinated US tourists and opened to international visitors two days ago.