Actress, screenwriter, and playwright, she is known for the series Autodefensa (2022), which she co-wrote and starred in alongside Belén Barenys, and which won the Feroz Award for Best Short-Form Series in 2023. The series, produced by Filmin, stands out for its raw and unfiltered portrayal of the lives of two friends in Barcelona, and it was praised for its authenticity and irreverent humor. Prieto is also a member of the theater collective Las Chatis de Montalbán.