Agnieszka Sitek (born 8 July 1973, Łódź) is a Polish film, television and theatre actress.

In 1996, she graduated from the National Academy of Dramatic Art in Warsaw.

Her most prominent role is featured in Vladimír Michálek's 1998 film Sekal Has to Die.

[3] In 1999, she received the Czech Lion Award for Best Supporting Actress conferred by the Czech Film and Television Academy (ČFTA) for her performance in the film.

In 2002, she played in Jerzy Antczak's biographic film Chopin: Desire for Love in which she portrayed Frederic Chopin's mother Izabela.