Marietta is a Swedish screenwriter for TV and film, and an international script consultant whose work over the last 12 years includes Sundance Labs, Torino Film Lab, Binger Amsterdam, Biennale College Venice, Feature Expanded, Hezayah (Doha), Boost Rotterdam FF, Toronto FF, and others. She has done script development in multiple countries and has been in international juries, such as CPH Dox and San Miguel main competition. She studied at Tisch School of Arts and is a voting member of the European Film Academy.