Marianna Polychronidi was born in Athens, Greece. She graduated from the Greek National Theater's School of Dramatic Art, in 2001. At the same time, she studied classic guitar and classic and modern singing. Since her graduation, she has been working in theater and television series, co-operating with famous directors, like Mihalis Kakogiannis, playing "Ophelia" in National Theater's production of "Hamlet" and Nikos Koundouros, playing a leading role in "Digenis Akritas", a Greek Festival's production in Odeon of Herodes Atticus. She also works as a singer, co-operating with famous composers, like Nikos Kypourgos and Thanos Mikroutsikos. In 2017 her first personal album "Stin omihli ton kairon" was released.