Gretha Viana is a Brazilian film producer and writer. She holds a B.A. in Journalism and a masters in Film Directing from the Instituto Brasileiro do Audiovisual as well as an M.A. in Dramatic Writing from Central Saint Martins in London. For six years, she co-ran Terra Vermelha Filmes (Red Earth Films). In 2020, Viana and Robert Bennett established Hy Brasil, an Irish production and I.P. development company based in North Dublin.