who is the actress that plays delilah on ncis
Margo Harshman Margo Cathleen Harshman (born March 4, 1986) is an American actress known for her role as Tawny Dean on the Disney Channel series Even Stevens. She is also known for her role on The Big Bang Theory as Sheldon Cooper's assistant, Alex Jensen, and as Delilah Fielding on NCIS.[1]