Actor Elliot Page has said a wave of bills targeting the transgender community in the US are "upsetting, cruel and exhausting".
Politicians in Alabama and North Dakota have approved bans on transgender women and girls from playing on sports teams that match their gender identity.
They joined a series of Republican-led states in having introduced bills critics describe as being anti-trans.
These include laws designed to ban gender-confirming surgery for transgender youths.
And he urged his social media followers to call politicians and voice their opposition to the legislation.
"As I watch the movement of these bills attacking trans youth across the US, especially this week in Florida, Alabama, Texas and North Dakota, I am thinking of my trans siblings and the collective pain that our community must endure to battle again and again for our right to exist," he wrote.
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"These bills are upsetting, cruel and exhausting."
The 34-year-old added: "Call your representatives. Tell them to oppose legislation that discriminates against us.
"Tell them our access to health care is an inalienable human right. Tell them to let trans kids play sports. Tell them that #TransPeopleBelong – we always have, and we always will."
He also shared a picture of himself holding up a sign reading "protect trans kids".
This year has seen a record number of anti-transgender bills introduced in the US, according to the Human Rights Campaign, an LGBT advocacy group.
Earlier this month Arkansas became the first US state to outlaw gender-affirming medical treatments or surgery for minors.