Graduated from Cherry Hill High School East. .
Took acting classes at New York University, giving a notable performance in "A History of Tears".
Earned a Tony Award nomination in 2012 for her performance originating the role of Girl in the Broadway musical "Once". Also, first had to learn to play the piano in order to play the part.
Learned to play the bass for her role in How I Met Your Mother (2005).
Her paternal grandfather was of Italian (Sicilian and Calabrian) origin, and Cristin calls her family "Olive Garden" Italian. The rest of her ancestry is Belgian, Czech, Irish, Scottish, and English.
Cristin was "Sara", the girl captivated by the Manhattan skyscrapers on the Ford Edge commercial of 2008.
She plays Cancer illness patient, both in "How I met your mother" and in "Fargo" TV Series (Season 2).