At the age of 16, she wins a scholarship to study International Baccalaureate (IB) in Swaziland, at Waterford Kamhlaba United World College of Southern Africa. After graduating, she got offered a place in the Contemporary Theatre Course at East 15 Acting School in London. She's worked in film, theatre and TV in England and Mexico City, where she is currently based. Marianna has played the lead in TV shows such as Paramédicos, Season 1 and 2 (Netflix) and El Torito (Claro Video), amongst many others.