The event is taking place at Facebook's London HQ and will be live streamed on the social media site. But you can also watch it here - hurrah!
When Watson announced the event earlier this week and invited fans to join her in person as an audience member, the internet (understandably) went into meltdown.
All hopefuls had to do was submit their stories explaining what they'd done to help advance gender equality.
Fans were also invited to submit questions to be discussed at the event.
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