Earlier this summer, fresh from college graduation, Emma Watson, was named a U.N. Women Goodwill Ambassador. Though the ripples of her involvement over the past few months can be seen online (crashing the U.N. Web site, using Twitter to denounce a sexist politician in Turkey or respond to the gender politics of the recent celebrity nude photo hack), Watson’s power in person is an entirely different matter.

The actress gave an impassioned speech on feminism and gender at the U.N. headquarters in New York this weekend to launch the “HeForShe” campaign which aims to galvanize one billion men and boys as advocates for ending the inequalities that women and girls face globally.

Watson’s speech, which was met with a thunderous standing ovation, not only called for action from male allies, but clarified a persistent misconception about feminism in general. She said:

I decided I was a feminist and this seemed uncomplicated to me. But my recent research has shown me that feminism has become an unpopular word. Apparently I am among the ranks of women whose expressions are seen as too strong, too aggressive, isolating, anti-men and, unattractive.

Why is the word such an uncomfortable one? I am from Britain and think it is right that as a woman I am paid the same as my male counterparts. I think it is right that I should be able to make decisions about my own body. I think it is right that women be involved on my behalf in the policies and decision-making of my country. I think it is right that socially I am afforded the same respect as men. But sadly I can say that there is no one country in the world where all women can expect to receive these rights.

Watson is pushing back against recent campaigns like Women Against Feminism. As Watson puts it elsewhere in her speech, these campaigns portray the feminist cause as “man-hating.” By involving both genders in the HeForShe campaign, Watson hopes to abolish the “us vs. them” mentality.

Watson is potentially in an even better position than many of her peers to do so. Her role as Hermione Granger, the universally adored heroine of the Harry Potter series, gives her an automatic in with male and female millenials. This is a rare case where an actor being conflated with their role might be a good thing. In this way, her widespread influence on young minds (still forming their opinions on gender roles and advocacy) is even stronger than other high-profile defenders of the F-word like Beyoncé.

Watson’s Harry Potter association also carries with it a disadvantage –– the fear she might not be taken seriously. She addresses this concern in her speech:

You might be thinking who is this Harry Potter girl? And what is she doing up on stage at the UN. It’s a good question and trust me I have been asking myself the same thing. I don’t know if I am qualified to be here. All I know is that I care about this problem. And I want to make it better.

And having seen what I’ve seen—and given the chance—I feel it is my duty to say something. English statesman Edmund Burke said: “All that is needed for the forces of evil to triumph is for enough good men and women to do nothing.”

That Harry Potter association will always follow Watson. Even U.N. Secretary-General Ban Ki-Moon joked, “She’s been waving a magic wand. I hope you use your magic wand to end violence against women!” But with her serious approach to advocacy, it’s impossible to laugh off Watson’s message. You can watch her entire speech here:

Update (7:33 P.M.): An earlier version of this article did not contain video of Watson’s speech.