Kelley was born and raised in St. Paul, Minnesota,[2] not including the four years she spent with her family in Brussels, Belgium.
Starting in the eighth grade, she took voice and acting lessons from her instructor, John Lynn.
[4][5] Her breakout role was in The Chicago Code, which she prepared for by talking to female police officers, going on a ride-along with Chicago police officers, and visiting a shooting range and the Cook County Morgue.
[6] She later starred as a lead character in the 2012 horror film Chernobyl Diaries, and had a recurring role on Covert Affairs.
[7] In 2013, Kelley was cast as Dr. Maggie Langston in the ABC drama series Resurrection.