Heather Laurie Holden (born December 17, 1972, Los Angeles) is an American-Canadian actress and human rights activist. She is perhaps best known for her roles as Marita Covarrubias in The X-Files, Adele Stanton on The Majestic, Cybil Bennett in Silent Hill, Amanda Dumfries in The Mist, Olivia Murray in The Shield, and Andrea in The Walking Dead. Born in Los Angeles and raised in Toronto, Holden holds dual citizenship in both the U.S. and Canada. She was born in 1972 to actors Glen Corbett and Adrienne Ellis. Her grandmother was actress Gloria Holden. Her parents divorced, and her mother married director Michael Anderson. Her first role was on The Martian Chronicles (1980), when she played Rock Hudson's daughter. A graduate of U.C.L.A, she is a member of the National Honor Society and has been the recipient of the prestigious Natalie Wood Acting Award. She is currently enrolled at Columbia University where she is acquiring her Master of Human Rights degree. Holden has starred in numerous television and film projects and has received worldwide critical acclaim and honorable recognition for her diverse and eclectic choice of roles.