Stasya Miloslavskaya was born in Moscow on May 4, 1995. As a child, she trained at the Rampa Children's Theatre Studio. She also graduated from a music school where she played the piano. In 2013 she entered Moscow Art Theatre School (Evgeniy Pisarev's class). After her graduation in 2017, she joined the company of the Moscow Pushkin Drama Theatre. As of now (2021) she is part of the Yermolova Theatre company.