Coming from an artistic family of actors, writers and producers. Father is Phil Proctor actor, comedian and founder of the Firesign Theatre, mother is Barbro Semmingsen, television producer. Kristin's television debut was at the age of 8 on Norwegian television. Born in Los Angeles and raised in Norway, she later went on to train at American Repertory Theatre, a part of Harvard University in Cambridge, Mass. Her first major stage role was starring as "Sasha" opposite Debra Winger and Arliss Howard in the A.R.T production of "Ivanov". She has since then appeared with Drew Barrymore in Riding in Cars with Boys (2001) and on the ground breaking HBO show The Wire (2002), as well as numerous TV shows and national commercials.