Elizabeth Anne Caplan (born June 30, 1982) is an American actress and model. Her first acting role was on the cult television series Freaks and Geeks (1999–2000). She received wider recognition with roles in the films Mean Girls (2004) and Cloverfield (2008), the latter of which earned her a nomination for the Saturn Award for Best Supporting Actress. Caplan has also starred on the TV shows Related (2005–2006), The Class (2006–2007), and Party Down (2009–2010). From 2013 to 2016, she played Virginia E. Johnson on the Showtime series Masters of Sex, a role that garnered her Primetime Emmy, Satellite, and Critics' Choice Award nominations. In 2019, Caplan portrayed Annie Wilkes in the Hulu anthology series Castle Rock.