The Daily ItemSALEM n Eleven-year-old Nina Darcy of Salem, who has many relatives in Lynn, has a small part in the upcoming movie Knight and Day starring Tom Cruise and Cameron Diaz.The movie was filmed in many Massachusetts locations last summer and is due for release this month.The young actress is also currently filming minor roles in Emerson College senior thesis films, and an independent film for a national competition. Last year she appeared in a local picture called “A Child’s Dream,” directed and produced by Widmack Productions, a Boston Haitian film company.Other film credits include lead roles in “Creep,” a www.screwdriver.tv production entered into a Maine film festival in 2008; and the 2007 short film “Day Dream,” produced by Zebra XRay Tango Productions. Nina has been enrolled in Boston Casting acting classes for three years and was promoted in February to its teen improv group, and receives private training from acress Anastasia Barnes, who also works for CP Casting in Boston.Nina is the daughter of Derron Darcy of Salem and Joelle Darcy of Boxboro.