The actress and anti-sexual violence activist says in Hollywood, "the sky's the limit of how you're made to feel violated."
The Irish singer-activist said he was "sick of what has happened in the last 12 months."
Since the 2010 earthquake, Haiti has suffered from an epidemic of sexual violence—but more and more women are sharing their stories.
The planned guestlist includes Alistair Campbell, Ulrika Jonsson, Delia Smith, Germaine Greer, Louise Mensch and over 100 more.
The 34-year-old withdrew from the French Open on Thursday.