Antoni Stanisław Czetwertyński-Światopełk (1748–1794) was a noble (szlachcic) and politician in the Polish-Lithuanian Commonwealth. Held the title of Prince. He was known as one of the Polish magnates bribed by the Russian Empire. Member of many Sejms, including the 1772 and 1775, and the partition Sejm. He was a member of the commission negotiation the First Partition of Poland, an opponent of the Constitution of May 3 and participant of the Confederation of Targowica. Awarded the Order of Saint Stanislaw in 1785. Castellan of Przemyśl since 1790
In the aftermath of the Warsaw Uprising during the Kościuszko Uprising, he was imprisoned by the Polish revolutionaries. On 28 June 1794 an angry mob stormed the prison, and he was hanged together with other people declared traitors, like bishop Ignacy Jakub Massalski.
Światopełk is one of the figures immortalized in Jan Matejko's 1891 painting, Constitution of May 3, 1791.