Mary claims that being an actress was never something she thought about doing initially. She always wanted to be a "large animal vet" instead.
Mary says that her proudest achievement is staying married to the same man and having two "happy and healthy" children with him.
In 1963, Mary was nominated the Oscar for Best Actress in a Supporting Role in To Kill a Mockingbird (1962).
She remained close friends with Gregory Peck, Phillip Alford, and Brock Peters after filming the movie To Kill a Mockingbird (1962).
Her brother is director John Badham.
Mary Badham: (about Hollywood films today) As a mother, I want to take my children to the movies and not be embarrassed. I really believe independent films are going to save this country's film industry. People are tired of the 13-year-old boy jokes and foul language. You don't need to do that. To Kill a Mockingbird is full proof of that.