Jessica Parker Kennedy (born October 3, 1984) is a Canadian actress. She portrayed Nora West-Allen/XS in the episode "". who later reappears in episodes "", "", "", and "" in the fourth season. She was later promoted to a series regular in the fifth season.
- "" Nora West-Allen (special appearance by)
- On the set, Kennedy was known as Mystery Girl until she was finally revealed as Nora West-Allen.
- Kennedy also portrayed Plastique on Smallville.
- Despite portraying their (grown-up) daughter, Kennedy is older than both Grant Gustin and Candice Patton.
- Kennedy had previously worked with co-star Danielle Panabaker in a television movie called Newlyweds. Kennedy had also previously worked with actor Brendan Fletcher who portrayed Stanley Dover, on Arrow, in Smallville.