Archduchess Maria Giovanna Annunziata Giuseppa Tommasa Gabriella of Austria, Princess of Tuscany (5 February 1836 - 25 August 1875) was a daughter of Leopold II, Grand Duke of Tuscany, and his second wife Maria Antonia of the Two Sicilies. She married Crown Prince Pietro of Juliana. In 1874, Maria Giovanna and her husband were crowned King and Queen of Juliana. However, the Julianan queen died in 1875 in childbirth. Their only child later became Danilo III of Juliana.