Daniel Radcliffe admits that his first brush with homophobia came as a shock to him. (Photo from Equus)

Much like the valiant wizard robe-wearing, fantasy book hero he plays, "Harry Potter," Daniel Radcliffe is his own activist even in real life.

The 20-year-old British actor has just filmed a public service announcement (PSA) last February 26 in New York City for The Trevor Project, a non-profit, 24/7 help line that aims to provide counseling and prevent suicide among lesbians, gays, bisexuals, transgender, and questioning (LGBTQ) youth.

And perhaps, if he would cast a spell that would eradicate the rising problem of homophobia, he might use “Crucio.” The young actor has been vocal about his stand against this for quite some time now.

“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,” Daniel said in an AP article.

The Trevor Project, which was founded in 1998 by filmmakers James Lecesne, Peggy Rajski, and Randy Stone, came to Daniel’s knowledge during his Broadway stint via “Equus” back in 2008. Their film “Trevor,” about a gay teen who attempted to commit suicide, snagged the “Best Short Film” trophy at the Academy Awards in 1994.

Daniel admitted that his first brush with homophobia came as a shock to him, for he grew up “knowing a lot of gay men,” since his parents were both actors.

"Some are gay, some are straight—didn't make any difference to me. When I went to my second school, I heard terms like 'puff' and 'homo' getting thrown around. It never occurred to me that some people might have a problem with it. I remember being quite shocked when I was young,” he recounted in an interview on MTV.

Translating his passion to the cause to something tangible, Daniel is acknowledged as one of the organization’s largest donors, who also includes Anne Hathaway, Neil Patrick Harris, Jodie Foster, Meredith Vieira, and Sacha Baron Cohen.

"I think it's important for somebody from a big, commercial movie series like 'Harry Potter' and particularly because I am not gay or bisexual or a transgender... The fact that I am straight makes not a difference, but it shows that straight people are incredibly interested and care a lot about this as well,” the film and stage actor related.

Growing up, he has "always felt very lucky to have the life that I've had. I never had to cope with anything serious about my religion or sexual orientation or anything like that.”

According to a Trevor Project press release, LGBTQ teens are four times more likely to commit suicide than the heterosexuals.

"I was talking to one of the [volunteers] who said, 'I hate the fact that this needs to exist.' But it's so important that it does,” said Daniel.

The PSA is set to air come spring season.