The Secret of NEST is a 1981 is a American animated dark-science fantasy adventure film directed by Scott Webb in his directorial debut.
- Paul DeLuise as Jimmy, A Crow. The deurtagonist of the film.
- Liza Minnelli as Mrs. Brisbee, A Mouse. The protagonist of the film.
- Roy Kinnear as Jackson, the leader of the Mice of NEST.
- Freddie Jones as Mr. Rages, Mrs. Brisbee's Dad. He is a Retired Nurse from NEST.
- Michael Hordern as Johnson, a Rat. The main antagonist of the film.
- David Jason as Silver, a rat. The second antagonist of the film.
- Frank Welker as Jenna, a Cat.
- Joan Gerber as Auntie Screw, Mrs. Brisbee's sister. She takes care of her children while she is with Jimmy.
- Michelle Stacy as Tessa Brisbee
- Sean Marshall as Marco Brisbee
- Lisa Norris as Sylvia Brisbee
- Sparky Marcus as Tommy Brisbee