Judith Therese Evans (born July 20, 1975), known professionally as Judy Greer, is an American actress. She is primarily known as a character actress who has appeared in various films. She rose to prominence for her supporting roles in the films Jawbreaker (1999), What Women Want (2000), 13 Going on 30 (2004), Elizabethtown (2005), 27 Dresses (2008), and Love & Other Drugs (2010).

Greer expanded into multiple genres with roles in films, such as The Wedding Planner (2001), Adaptation (2002), The Village (2004), The Descendants (2011), Jeff, Who Lives at Home (2011), Carrie (2013), Men, Women & Children (2014), Grandma (2015), Lemon (2017), Where'd You Go, Bernadette (2019), Uncle Frank (2020), and Hollywood Stargirl (2022). She appeared in numerous blockbusters, such as Dawn of the Planet of the Apes (2014) and its sequel War for the Planet of the Apes (2017), Jurassic World (2015), Halloween (2018) and its sequel Halloween Kills (2021), and the Marvel Cinematic Universe films Ant-Man (2015), Ant-Man and the Wasp (2018), and Guardians of the Galaxy Vol. 3 (2023). She made her directorial debut with the comedy-drama film A Happening of Monumental Proportions (2017).