Academy Award-nominated actor Elliot Page is announcing he's transgender, saying he'll do everything he can to "change this world for the better."

The "Umbrella Academy" star, formerly known as Ellen Page, shared a message with his more than 3 million followers in a Tuesday Instagram post.

"I want to share with you that I am trans, my pronouns are he/they and my name is Elliot," Page wrote.

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"I can't begin to express how remarkable it feels to finally love who I am enough to pursue my authentic self," the 33-year-old performer said, while noting his joy "is also fragile."

"The truth is, despite feeling profoundly happy right now and knowing how much privilege I carry, I am also scared. I'm scared of the invasiveness, the hate, the 'jokes' and of violence," Page wrote.

He also included some scathing words directed at the "political leaders who work to criminalize trans health care and deny our right to exist" and who "continue to spew hostility towards the trans community."

"You have blood on your hands," he said. "You unleash a fury of vile and demeaning rage that lands on the shoulders of the trans community, a community in which 40% of trans adults report attempting suicide."

"Enough is enough," said Page. "You aren't being 'cancelled,' you are hurting people. I am one of those people and we won't be silent in the face of your attacks."

It's not the first time Page, who married dancer Emma Portner in 2018, has called out anti-LGBT rhetoric.

He blasted Vice President Pence in a 2019 interview, saying, “Let’s just be clear. The vice president of America wishes I didn’t have the love with my wife. He wanted to ban that in Indiana."

"He believes in conversion therapy. He has hurt LGBT so badly as the governor of Indiana,” the "Juno" star said during an appearance on CBS's "The Late Show."

Pence's office denied in a 2018 statement to The Hill that the vice president supports "gay conversion therapy."

In his Tuesday Instagram post, Page said, "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."

Delaware's Sarah McBride (D), who last month was elected as the nation's first openly transgender state senator, was among those who offered him congratulations on Twitter.

LGBTQ advocacy group GLAAD applauded Page's remarks, with Nick Adams, its director of transgender media, saying the entertainer has "given us fantastic characters on-screen, and has been an outspoken advocate for all LGBTQ people.”

“He will now be an inspiration to countless trans and non-binary people," Adams said. "All transgender people deserve the chance to be ourselves and to be accepted for who we are. We celebrate the remarkable Elliot Page today.”

—Updated at 3:29 p.m.