Andrea Louise Martin is an American and Canadian actress, best known for her work in the television series SCTV and Great News. She has appeared in films such as Black Christmas (1974) and its 2006 remake, Wag the Dog (1997), Hedwig and the Angry Inch (2001), My Big Fat Greek Wedding (2002), My Big Fat Greek Wedding 2 (2016), Little Italy (2018) and My Big Fat Greek Wedding 3 (2023). She has also lent her voice to the animated films Anastasia (1997), The Rugrats Movie (1998), and Jimmy Neutron: Boy Genius (2001). From 2021 to 2024, she co-starred in the supernatural drama series Evil. She is currently playing a recurring role on Only Murders in the Building (2021).