Kristen played the main character of Estella in TheatreworksUSA's world premiere stage adaptation of Great Expectations in 2006.
Kristen starred in a revival of King Learin March of 2007. She played Cordelia, opposite Kevin Kline and Michael Cerveris.
New York Times theatre reviewer Andrea Stevens said Kristen looks like Scarlett Johansson.
She was set to play the role of Nat in the 2007 Off-Broadway American premiere of Patrick Marber's Howard Katz but was replaced by Charlotte Parry. No reason was given for the casting change.
She played the role of Abigail Williams in Arthur Miller's The Crucible in a 1997 community theatre production of the play in Sterling, Kansas.
Kristen: (on how she got her start in acting) "We lived across the street from the theater at Sterling College, and my parents made me audition for Oliver! when I was 11," she recalls. "I got cast as a workhouse boy and one of Fagin's boys, and I knew from that moment that I loved to act. There was no looking back—and it's my parents' fault!"