Elizabeth Anne "Lizzy" Caplan (born June 30, 1982) is an American actress. She is known for her roles in films such as Mean Girls (2004), Cloverfield (2008), Hot Tub Time Machine (2010), and Bachelorette (2012). Her most notable television roles include Marjee Sorelli in Related, Kat Warbler in The Class, Amy Burley in True Blood, Casey Klein in Party Down, and Virginia Johnson in Masters of Sex.