Glenn Close resented her father for forcing her to grow up in a cult.
The 'Wife' actress and her family moved to Switzerland when she was a child to be closer to the headquarters of the Moral Re-Armament - which was founded in the 1930s by Rev. Frank Buchman, an alleged supporter of Adolf Hitler who believed the world could avoid war if people experienced a moral and spiritual awakening, and largely died out in the late 1960s - and after leaving the sect when she was 22, she wrote a ''very, very angry'' note to her dad telling her how he felt about his decision.
She recalled: ''There came a point where I got very, very angry at my father and I wrote him this letter where I was absolutely honest with [him].
''I said, 'You don't deserve to be called our father.' I mean, it was so harsh. In fact, I read it to my mother and I read it to my siblings and I said, 'I'm just going to send this to dad,' because he was a narcissist and he was brilliant, brilliant, but he definitely had a dollop of narcissism.''
The 71-year-old actress also believes her mother wasn't entirely without blame because she ''enabled'' her father at the expense of her own happiness.
Speaking on People TV's 'The Jess Cagle Interview', she said: ''I think in many ways my mom enabled him.
''She never developed her, where she was brilliant, to the point where she said to me, near the end of her life, 'I feel like I haven't achieved anything.' ''
But as the years of gone by, the 'Fatal Attraction' star have grown to understand why her parents got swept away by the Moral Re-Armament.
She said: ''I've learned more and more about them and more about what their situation was and how vulnerable they were at certain times.
''I think I really understand why they were so vulnerable to a group like that. Not knowing the devastation that it would cause their children.''
After the family left the group, it wasn't a subject they discussed very much.
Glenn said: ''Each of us had to go through that process of forgiveness.
''It wasn't easy for my parents to talk about, certainly my father. But I guess I've made my career figuring out the why's of behaviour, and I did the same thing with my parents.''