The Juno star formerly known as Ellen Page has announced that he is transgender.
The actor said in a social media post that his pronouns are "he/they" and his name is Elliot.
"I feel lucky to be writing this. To be here. To have arrived at this place in my life," Page added.
"I feel overwhelming gratitude for the incredible people who have supported me along this journey.
"I can't begin to express how remarkable it feels to finally love who I am enough to pursue my authentic self."
Ellen Page out and about
Ellen Page out and about
LOS ANGELES, CA - SEPTEMBER 27: Actress Ellen Page attends the premiere of 'Flatliners' at The Theatre at Ace Hotel on September 27, 2017 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)
LOS ANGELES, CA - OCTOBER 07: Actress Ellen Page (L) and dancer Emma Portner arrive at the L.A. Dance Project's Annual Gala at L.A. Dance Project on October 7, 2017 in Los Angeles, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
TORONTO, ON - SEPTEMBER 15: Actress Ellen Page attends the 'My Days of Mercy' premiere during the 2017 Toronto International Film Festival at Roy Thomson Hall on September 15, 2017 in Toronto, Canada. (Photo by Tara Ziemba/WireImage)
NEW YORK, NY - SEPTEMBER 14: Ellen Page discusses 'Flatliners' with the Build Series at Build Studio on September 14, 2017 in New York City. (Photo by Roy Rochlin/Getty Images)
TORONTO, ON - SEPTEMBER 09: Emma Portner (L) and Ellen Page attend 'The Cured' premiere during the 2017 Toronto International Film Festival at Ryerson Theatre on September 9, 2017 in Toronto, Canada. (Photo by Jeremy Chan/Getty Images)
TORONTO, ON - SEPTEMBER 11: Ellen Page at the MY DAYS OF MERCY premiere party hosted by GREY GOOSE Vodka and Soho House on September 11, 2017 in Toronto, Canada. (Photo by Stefanie Keenan/Getty Images for Grey Goose)
TORONTO, ON - SEPTEMBER 09: Actress Ellen Page of 'The Cured' attends The IMDb Studio Hosted By The Visa Infinite Lounge at The 2017 Toronto International Film Festival at Bisha Hotel & Residences on September 8, 2017 in Toronto, Canada. (Photo by Rich Polk/Getty Images for IMDb)
LOS ANGELES, CA - APRIL 08: Actress Ellen Page attends to a live read of 'Juno' benefiting Planned Parenthood at The Theatre at Ace Hotel on April 8, 2017 in Los Angeles, California. (Photo by Tara Ziemba/Getty Images)
WASHINGTON, DC - JANUARY 19: Actress Ellen Page attends the Busboys and Poets' Peace Ball: Voices of Hope and Resistance at National Museum Of African American History & Culture on January 19, 2017 in Washington, DC. (Photo by Mike Coppola/Getty Images for Busboys and Poets)
LOS ANGELES, CA - SEPTEMBER 11: Actress Ellen Page arrives at the 2016 Creative Arts Emmy Awards at Microsoft Theater on September 11, 2016 in Los Angeles, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
NEW YORK, NY - JULY 19: Actress Ellen Page attends the special screening of 'Tallulah' hosted by Netflix at Landmark Sunshine Theater on July 19, 2016 in New York City. (Photo by Jim Spellman/WireImage)
NEW YORK, NY - JULY 19: Tammy Blanchard, Allison Janney and Ellen Page attend Netflix Hosts the After Party for 'Tallulah' at The Jimmy at the James Hotel on July 19, 2016 in New York City. (Photo by Sylvain Gaboury/Patrick McMullan via Getty Images)
HOLLYWOOD, CA - JUNE 22: Actress Ellen Page arrives at the premiere of A24's 'Into The Forest' at ArcLight Hollywood on June 22, 2016 in Hollywood, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
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Page, 33, who has also starred in Netflix series The Umbrella Academy, said that his "joy is real, but it is also fragile".
"The truth is, despite feeling profoundly happy right now and knowing how much privilege I carry, I am also scared," he said.
"I'm scared of the invasiveness, the hate, the 'jokes' and of violence.
"To be clear, I am not trying to dampen a moment that is joyous and one that I celebrate, but I want to address the full picture. The statistics are staggering.
"The discrimination towards trans people is rife, insidious and cruel, resulting in horrific consequences."
Addressing the trans community, Page said he will "do everything I can to change this world for the better".
Page, who is married to choreographer Emma Portner, added: "I love that I am trans. And I love that I am queer.
"And the more I hold myself close and fully embrace who I am, the more I dream, the more my heart grows and the more I thrive."
The actor, who has frequently spoken out about LGBT issues, signed the letter off by saying: "All my love, Elliot."
Commenting on Page's Instagram post, Portner wrote: "Love you so much Elliot."