Sadie Elizabeth Sink (born April 16, 2002) is an American actress. She began her career in theater as a child, playing the title role in the musical Annie (2012–2014) and young Elizabeth II in the historical play The Audience (2015) on Broadway. In 2016, she made her film debut in the biographical sports drama Chuck. Sink had her breakthrough portraying Max Mayfield in the Netflix science fiction horror series Stranger Things (2017–2025), and she received critical praise for her performance.