Kajlich began her career with the Olympic Ballet Theater as a ballet dancer in Edmonds, Washington. After seven years, she decided to try acting. By that time, she had already performed lead roles in "The River", "Swan Lake", and "The Nutcracker". Kajlich's first acting part was in an advertisement for Kragen Auto Parts. She has since appeared in the films "Bring It On", "10 Things I Hate About You", "", and "30 Minutes Or Less". Kajlich also had recurring roles in the television series "Boston Public" as Lisa Grier and in "Dawson's Creek" as Natasha Kelly, as well as roles in UPN's "Rock Me Baby" and the Fox drama "Vanished".