Toronto filmmaker Sarah Polley among Canadian triumphs at the Oscars

An extraordinary win for Toronto writer-director Sarah Polleywas one of manypivotal points during a victorious night for Team Canada at the Oscars, with additional key wins for Montreal prosthetics designer Adrien Morot, Toronto documentary filmmaker Daniel Roher and Canadian American actor Brendan Fraser.

Polley, who directed an adaptation of Manitoba author Miriam Toews's novelWomen Talking, won for best adapted screenplay.

It's been a rollercoaster awards season for Polley, with Women Talkingalso nominated for best picture.

She told CBC News last weekthat she was working on a project that documented the experience.

"First of all, I want to thank the academy for not being mortally offended by the words 'women' and 'talking' so close together like that cheers," Polley joked at the beginning of her acceptance speech, referring to the Academy of Motion Picture Arts and Sciences.

Throughout awards season, she has pushed back on criticism and snarky commentsdirected at the film's title.

She honouredToews, who wrote thenovel about a group of Mennonite womentaking charge of their destiny after enduring years of sexual abuse by the men in their colony.

"Miriam Toews wrote an essential novel about a radical act of democracy in which people who don't agree on every single issue manage to sit together in a room and carve out a way forward together, free of violence," Polleysaid onstage at the Oscars.

"A young woman delivers the last line of our film to a new baby, and she says:'Your story will be different from ours,'" Polley added."It's a promise, a commitment and an anchor,and it's what I would like to say with all of my might to my three incredible kids Eve, Isla and Amy as they make their way through this complicated beautiful world."

Other Canadians making their Oscar mark

In one of the last awards presented at the Dolby Theatre on Sunday, Fraser took the Academy Awardfor best actor for The Whale. He portraysan English writer-lecturer who becomes a recluse and spirals into morbid obesity.

Fraser was born in the U.S. to Canadian parents and lived for a time in Ottawa.A prominent star at the outset of his career in the 1990s, with films including Encino Man, George of the Jungle and The Mummy movies, the Oscar isFraser'slatest accolade during an emotional comeback year.

Earlier Sunday evening, Roher took home the first Canadian win, for his film Navalny, which won best documentary feature film. He gave a rousing speech, calling out the subject of his film Russian opposition leader Alexei Navalny who is currently detained in solitary confinement.

"I would like to dedicate this film to Navalnyand to all political prisoners around the world," Roher said.

Morot won an Oscar for his work on The Whale, along with makeup artist Judy Chin and hairstylist Annemarie Bradley.

Morot and the makeup and hairstyling team transformed Canadian-American actor Fraser into a 600-poundman for his lead performance as Charlie.