Justin Kuritzkes (/kəˈrɪtskɪs/ kə-RIT-skiss; born May 5, 1990) is an American writer best known for writing the screenplays for Luca Guadagnino's films, Challengers and Queer (both 2024). He has also been the subject of media coverage for his YouTube content, including the viral 2011 video "Potion Seller".