Mary Alexandra Stiefvater was born in Chico, California and grew up in Stockton, where she was first introduced to theater and dance at a young age. Her first break came on "The Late Show with David Letterman" where she regularly appeared in comedy skits. At the same time, she did motion capture work for the character of Mona Sax in "Max Payne 2" with Rockstar Games. The collaboration with Rockstar Games continued on "Grand Theft Auto: San Andreas" and "The Warriors". Later, she moved to Los Angeles, where further success came in television ("The Mentalist", "The New Adventures of Old Christine", "Terminator: The Sarah Connor Chronicles", "The Wedding Bells" & "Happy Hour").

She is known mainly for her work in independent films ("Supergator", "Bear", "Speed-Dating", "Driving By Braille", "Loveless in Los Angeles", "The Perfect Boyfriend", "Easy Rider: The Ride Back", & "Four Lane Highway"), she has also appeared in numerous print ads ("Verizon", "Babies-R-Us", "Fera Skiwear", "Quenchwear", "Cargo magazine", "Stuff magazine" & "The San Francisco Embarcadero Christmas Catalog"), commercials ("Bud Light", "Volvo", "Lupus PSA", "Red Bull Sugar-free", "Style Network", "1-800-Collect" & "TGIFriday's") and web-series ("Playdate" & "Rules of the League"). She is the host of "My Favorite Cup", a show all about coffee and tea. She works as a producer, actress, model, screenwriter, photographer and poet.
Shows
RoleShowYear
Kate Ballard Rules of the League 2009
Alisn Randolph The Mentalist 2008
Young Ruby Terminator: The Sarah Connor Chronicles 2008
Isabelle The Wedding Bells 2007
Cerise The New Adventures of Old Christine 2006
Jill The Playbook 2005

Movies
RoleMovieYear
Gail Playdate 2013
Attractive Woman The Perfect Boyfriend 2013
Olivia Robles-Corso Driving by Braille 2011
Frenchita Speed-Dating 2010
Liz Bear 2010

imdb link