Petra Černocká (* November 24, 1949 Prague) is a Czech singer and actress, sister of disc jockey Pavel Černocký and cousin of Vlastimil Brodský.

She studied opera singing and piano at the conservatory, and after graduating from school she began singing with the group The Shepherds of Petr Hannig. In the Semafor Theater she played in the legendary Šimkov and Grossmann's play Besídka v rašeliništi, later in Suchý's plays Jonáš a dr. Mattresses and Witches. She played and sang the young witch Saxana, a flying girl on a broom, a little later in the film of the same name by screenwriter Miloš Macourek and director Václav Vorlíček. As an actress, she also appeared in several other Slovak television programs. In 2011, she returned to the screen in the film Saxan and the Lexicon of Magic by director Václav Vorlíček.