Mariann Mayberry (May 25, 1965 – August 1, 2017) was an American actress. She was born in Springfield, Missouri, though she was raised in Chicago, Illinois. She spent most of her career in Chicago performing at the Steppenwolf Theatre Company. She was known for her stage roles in August: Osage County and One Flew Over the Cuckoo's Nest. In movies, she was known for her role as Mother in the 2005 movie War of the Worlds.
- Jones, Chris. "Chicago actress Mariann Mayberry is dead at 52". Chicago Tribune. Retrieved August 1, 2017.
- Vitello, Barbara (August 1, 2017). "Steppenwolf Theatre mourns longtime ensemble member Mariann Mayberry". Daily Herald.