From Wikipedia, the free encyclopedia. Mariann Mayberry was an American television and stage actress. Mayberry was an ensemble member of the Steppenwolf Theatre Company in Chicago, Illinois since 1993. While at Steppenwolf she was nominated for a Joseph Jefferson Award for Actress in a Supporting Role in a Play for Time of My Life, and again for Actress in a Principal Role in a Play for Hysteria, directed by John... see more