Elliot Page has described his decision to publicly come out as transgender as "imperative" at a time when the community feels under attack.
The actor, 34, first announced his transition on social media in December and has spoken to presenting powerhouse Oprah Winfrey to discuss it in more detail.
In a trailer for The Oprah Conversation interview, which will begin streaming on Apple TV+, Elliot described his "duty" to go public.
He said: "I was expressing this to people in my life much before posting that letter and telling people for the first time and knowing I wanted a moment to become comfortable in myself and to be able to get to that point.
"For me, in this time we're in right now and especially with this horrible backlash we're seeing towards trans people, particularly trans youth, it really felt imperative to do so."
Elliot made reference to the laws in certain US states that currently limit access of certain medical treatments for young transgender people.
There are also laws which stop transgender people from participating in sports.
Elliot is best known for an Oscar-nominated role in 2007 coming-of-age drama Juno and for his role in The White Violin in Netflix superhero series The Umbrella Academy.
He told Oprah that is was "crucial and important" to publicly come out.
The 67-year-old presenter also asked what part of his transition had brought him the most joy.
He emotionally replied: "Getting out of the shower and the towel's around your waist and you're looking at yourself in the mirror and you're just like, 'there I am'.
"And I'm not having the moment where I'm panicked, I'm not having all these little moments that used to be...
"Just being in a T-shirt. It's being able to touch my chest and feel comfortable in my body for the, probably the first time. Tears of joy."
In a previous interview, Elliot described how he felt his transition was helping him in his acting career.
Last month, his team told Time that they were "seeing more activity than they have in years" in terms of job offers.
The Elliot Page episode of The Oprah Conversation premieres Friday April 30 on Apple TV+.
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