Elizabeth Anne "Lizzy" Caplan is an American actress. She is best known for her roles in the CBS show The Class, in the 2004 film Mean Girls, and the 2008 film Cloverfield. She has also guest starred on the critically acclaimed HBO TV series True Blood in 2008 and starred as "Casey Klein" in the Starz network comedy Party Down.

She provides the voice of Steve's occasional love interest Debbie Hyman.