Heather Laurie Holden (born December 17,[1] 1969[2][3]) is an American-Canadian actress, producer, model, and human rights activist. She portrayed Marita Covarrubias in The X-Files (1996–2002), Andrea Harrison in AMC's The Walking Dead (2010–2013, 2020–2022), Cybil Bennett in Silent Hill (2006) and Amanda Dumfries in The Mist (2007