Spacey's older brother Randall Fowler has told how they grew up in a house of horrors with a paedophile father who was also a Nazi sympathiser who trimmed his moustache to look like his "hero" Adolf Hitler!
He says that his father Thomas Geoffrey Fowler raped him repeatedly throughout his adolescence.
"Neither of us had a chance growing up with two such damaged parents. I went through three marriages and 40 affairs," says Randall.
"There was so much darkness in our home it was beyond belief. It was absolutely miserable.
"Kevin tried to avoid what was going on by wrapping himself in an emotional bubble. He became very sly and smart.
"He was so determined to try to avoid the whippings that he just minded his Ps and Qs until there was nothing inside. He had no feelings."
Randall, who works as a Rod Stewart impersonator and limo driver, also reveals that his father was a Nazi sympathiser.
When Kevin Spacey was just a young boy his clearly mentally unstable father joined the American Nazi Party and even trimmed his mustache to resemble his "hero" Adolf Hitler.
Randall says he was just 12-years-old the first time his father sexually abused him. "He unbuttoned my pants and started playing with me," he recounts.
He remembers yelling out for his mother. "She came right up and pounded on the door but Dad had locked it and he told me to keep quiet. All of a sudden the pounding stopped. Mom had left. I'd never felt so abandoned. Dad started to perform a sex act on me. That was the beginning of my adolescence."
In an exclusive interview with the Daily Mail, Randal went into details about the horrifying ordeal and paints a picture of growing up in what can only be described as a house of horrors.
Randall says that he managed to stop his father from raping his younger brother Kevin. "I constantly threatened my father that if he ever touched my brother, I'd confront my mother with what was going on and that would destroy the family," he says.