Harry Potter star Daniel Radcliffe has filmed a public service announcement to help prevent suicide among lesbian, gay, bisexual and transgender youth.
Radcliffe made the film for The Trevor Project, a non-profit US organisation that runs a 24-hour helpline.
The 20-year-old actor said he knew many gay men when he was growing up.
"Then I went to school and (for) the first time I came across homophobia," he said. "I had never encountered it before. It shocked me."
He added: "I have always hated anybody who is not tolerant of gay men or lesbians or bisexuals. Now I am in the very fortunate position where I can actually help or do something about it."
The public service film was shot at the Trevor Project's offices on Wall Street, New York, and will be aired this spring.
Last year, the organisation revealed that Radcliffe had given them a "major donation".