Sadie Elizabeth Sink is an American actress. She began acting at age seven in local theater productions and played the title role in Annie (2012–14) and young Elizabeth II in The Audience (2015) on Broadway. In 2016, she made her film debut in the biographical sports drama Chuck.

The second season of the science fiction television series Stranger Things, marketed as Stranger Things 2, was released worldwide on the streaming service Netflix on October 27, 2017. The series was created by the Duffer Brothers, who also serve as executive producers along with Shawn Levy, Dan Cohen and Iain Paterson.