Ellen J. Hornstein (born 10 December 1971; age 52) served as a production assistant on Star Trek: First Contact and as an assistant for Jonathan Frakes on Star Trek: Insurrection. She is the niece of Star Trek producer/ unit production manager Marty Hornstein.
Hornstein is also a personal assistant and story editor for Jonathan Frakes on his production company "Goepp Circle Productions" and served in this position also for Clockstoppers, (2002, featuring Ken Jenkins, Scott Thomson, Gina Hecht, Billy Mayo, Jenette Goldstein, Jeff Ricketts, and Frakes' himself.
Prior to her work for Frakes, Hornstein served as construction production assistant for The Crow: City of Angels (1996, starring Mia Kirshner, with Iggy Pop). Beginning with the year 2003, Hornstein has served as assistant for director/ producer David B. Householter. In this position she participated on films such as Elf (2003), Talladega Nights: The Ballad of Ricky Bobby (2006, featuring Gary Cole), Norbit (2007), and Step Brothers (2008, featuring Adam Scott).