Showbiz
Rex Features
The Harry Potter film star has filmed a public service announcement for The Trevor Project, a non-profit organisation that runs a helpline 24-hours a day.
The 20-year-old told the BBC: "I went to school and [for] the first time I came across homophobia. 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 organisation last year revealed that Radcliffe had given them a "major donation". The video featuring Radcliffe will air in the spring.
More: Daniel Radcliffe, Showbiz
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