Kasia Pietrzko is a Polish pianist and jazz composer. She was born in Bielsko-Biała in 1994. She studied at the Music School of Stanisław Moniuszko in Bielsko-Biała, and then studied jazz piano at the Academy of Music in Kraków. She perfected her skills in New York. In 2017, she released her debut album Forthright Stories at her own expense. In December 2015, together with the Stanisław Słowiński Quintet, she won the Grand Prix of the 39th Jazz Juniors International Competition of Young Jazz Bands in Krakow.