MEL GIBSON's adopted gay brother has never revealed his secret identity or truth about his famous family, until now.
Andrew Gibson, 43, has finally broken his self-imposed silence after watching his sibling's reputation get torn to shreds in the wake of allegations by his ex-partner Oksana Grigorieva and his impending divorce from wife of 28 years, Robyn.
Defending the embattled actor, Mr Gibson, a PA to a financier, said the entire Gibson clan refused to believe alleged taped conversations of Mel, 55, using abusive, homophobic and racist language are really of him.
"When I heard them I just thought, 'That isn't Mel'. He has never said anything abusive, aggressive or racist in his life," he told The Sunday Times.
"I just had to turn the TV off and turn it to the wall for two weeks so I didn't have to listen. The rest of the family did the same."
While he admitted his brother had made homophobic remarks during a 1991 interview, in which the actor referred to not wanting to "take it up the arse".
"With this look, who's going to think I'm gay? I don't lend myself to that type of confusion," he said at the time. "Do I look like a homosexual? Do I talk like them? Do I move like them?"
But an openly gay Mr Gibson said his brother's comments were not meant to cause any offence and, when he had come out to family and friends more than two decades ago, Mel had been supportive.
"He's a straight man and he was illustrating that fact. In the same way a gay man wouldn't want to have sex with a woman," he said.
"He never meant to upset anyone. I have never once heard anything anti-gay come out of his mouth.
"(Coming out) was one of the most terrifying things I have ever done. I was 22. When I told my dad he cried and blamed himself he felt he had done something wrong.
"That broke my heart and I told him it wasn't my fault. I think they all suspected. I was at a family dinner at Aria restaurant when I told Mel. He just said, 'It's not my choice, but I love you and you're my brother'."
However, after revealing his sexuality Andrew was thrown into turmoil and deliberately estranged himself from the family.
"I distanced myself and they didn't come after me. It was a very difficult time. They didn't like my choice of boyfriends they wanted me to go out with a Country Road queen and I like strong, dangerous men."
After coming out, Mr Gibson said he spent 10 years trying to come to terms with how his parents Hutton, now 92, mother Anne, who died in 1991, and five brothers and five sisters perceived him. He still attended family functions and saw Mel when he was in Australia, but things were tough,
"It was a struggle and it took a long time. Even after 10 years when I came back to the family for a while, I still didn't feel it was right. It has only really been in the last 12 months that we have really built up contact again," he said.
Mr Gibson, who lives in Redfern, Sydney, said he was incredibly sad about his brother's divorce.
"She (Robyn Moore) is one of the strongest women I have ever met. It was incredibly sad when they split. But something wasn't right and when I heard, it confirmed what I thought," he said.
"Robyn is wonderful and has been there since the beginning. It's just that sometimes people fall out of love with each other."
She is now in line for a potential payout of half of the actor's $US1 billion fortune. But he says Mel would give her every last penny.
"He doesn't really care about money at all he would rather have love and happiness in his life," he said.