Amy Beth Dziewiontkowski (born May 3, 1968), known professionally as Amy Ryan, is an American actress. She began her professional stage career in 1987 and made her Broadway debut in 1993 as a replacement in the original production of Wendy Wasserstein's The Sisters Rosensweig. She was nominated for the Tony Award for Best Featured Actress in a Play for her performances in Uncle Vanya (2000) and A Streetcar Named Desire (2005), and the Tony Award for Best Actress in a Play for Doubt: A Parable (2024).
For her breakthrough film role as a troubled single mother in the thriller Gone Baby Gone (2007), Ryan was nominated for the Academy Award for Best Supporting Actress. Her other films include You Can Count on Me (2000), Capote (2005), Before the Devil Knows You're Dead (2007), Changeling (2008), Birdman (2014), Bridge of Spies (2015), The Infiltrator (2016), and Beau Is Afraid (2023).