Emma Watson wants to know: "What are you doing to advance gender equality?"
The British actress will be discussing gender equality before a select audience in London, March 8, to celebrate International Women's Day.
The Harry Potter star is holding the special Q&A as part of the U.N. Women's HeForShecampaign for gender equality.
She invited fans to describe in 500 words or less, how they're advancing gender equality, for a chance to attend the event in person.
Those missing out on a place, can still watch it live on Watson's Facebook page.
The event follows her impassioned speech at the U.N. headquarters in New York last year, where the 24-year-old described her personal feminist journey.
She called for all men to "take up this mantle so that their daughters, sisters, and mothers can be free from prejudice," at the HeForShe launch in September.
"Both men and women should feel free to be sensitive. Both men and women should feel free to be strong. It is time that we all perceive gender on a spectrum, instead of two sets of opposing ideals," said the U.N. Women Goodwill Ambassador.
Almost 230,000 men and boys across the world have since joined the campaign, including U.S. President Barack Obama, and actors Joseph Gordon-Levitt and Matt Damon.
Watson's open letter to Foxcatcher star Steve Carell, applauding him for wearing HeForShe cufflinks at the Oscars last month, also attracted huge coverage across social media.