Kaitlin made her feature film debut in Catch Me If You Can.
Kaitlin broke up with Waiting... co-star Justin Long in June 2007. They began dating in 2005.
Kaitlin has blonde hair and blue eyes.
Kaitlin started acting when she was in her late teens.
In June to August 2005, Kaitlin played the role Annie in A Good Soldier by Nicholas Kazan (directed by Scott Paulin) at the Odyssey Theatre in Los Angeles, California.