Maarja Johanna Mägi was born in Tartu, Estonia. She studied acting at the Estonian Academy of Music and Theatre and made her film debut as the female lead in Elmo Nüganen's movie trilogy Melchior The Apothecary, for which she was awarded Best Film Actress at the 2023 Estonian Film Awards. In 2022, she was honored as the Black Nights Star at the Black Nights Film Festival. She also plays a lead role in the upcoming film Aurora, which was made using the character-based improvisation method. Another stand-out credit is Ergo Kuld's Faulty Brides.