Marci Liroff (born February 3, 1958) is a casting director, intimacy coordinator and acting coach based in Los Angeles, California, known for her work in film and television.

While there, Liroff placed ICM clients on such shows as Happy Days, Mork and Mindy, WKRP in Cincinnati, Soap, Barney Miller, All in the Family, and Maude.

[2][better source needed] Liroff started as Fenton's assistant and worked on movies such as Raiders of the Lost Ark, and History of the World, Part I.

Liroff would go on to cast such films as St. Elmo's Fire, Pretty in Pink, The Cutting Edge, Mannequin, Jack Frost, The Iron Giant, Insomnia, Freaky Friday, Gothika, Mean Girls, The Spiderwick Chronicles, "Ghosts of Girlfriends Past" and Mr. Popper's Penguins.

As the casting director of the 2014 Weinstein-produced film Vampire Academy, she testified about Weinstein staging a sham audition with Jessica Mann, one of the star witnesses in the case.