After studying harpsichord under Władysław Kłosiewicz at the Warsaw Music Academy, she graduated with honours in 1988. In 1990 she received a degree from the Conservatoire National de Region de Rueil-Malmaison where she studied in the class of Huguette Dreyfus. She won second prize at the first All-Polish Wanda Landowska Harpsichord Competition and a prize at the Polish Piano Music Festival in Słupsk. She was also a finalist in the International Harpsichord Competition in Paris. She has participated in numerous master classes in Baroque music interpretation (Innsbruck, Villecrose, Cracow, Accademia Musicale in Siena).
Since 1991 Lilianna Stawarz has been associated with the Warsaw Chamber Opera, where she performs as a chamber musician, as well as conducting from her harpsichord larger instrumental and vocal-instrumental works, such as Bach´s St Mark Passion, Purcell´s Dido and Aeneas, Scarlatti´s Thetis on Scyros, works of Polish 18th century composers - Songs and Arias, or a cycle of six concertos - Marcin Mielczewski znany i nieznany. She also participated in the recording of six compact discs of 17th century music (Mielczewski´s Opera Omnia) and of an album of Polish Baroque music by Damian Stachowicz. Together with Jean-Claude Malgoire she collaborated in the preparation of and performed in the operas: Alceste by Lully (1997), Catone in Utica by Vivaldi (1998), The Return of Ulysses by Monteverdi, Tancrede by Campra.
In the field of chamber music Lilianna Stawarz has worked with such artists as Małgorzata Wojciechowska, Artur Stefanowicz, Olga Pasichnyk, Marta Boberska, Dorota Lachowicz, Simon Standage. She often gives concerts, at home and abroad, with the early music ensemble Il Tempo (Bruges, Brussels, Moscow, New York, New Brunswick, Rome, Berlin), with whom she has recorded several albums.
Since 1993 she has coached at the Early Music Wilanów International Summer School, where she also performs in numerous concerts. Since 2003 she has taught harpsichord at the Białystok branch of the Warsaw Music Academy.