Matthew McConaughey has revealed that he was "blackmailed" into having sex for the first time and that he was "molested by a man" when he was as a teenager.
The Academy Award-winning actor's revelations are featured in his new memoirs, titled Greenlights, which was released on Tuesday.
In excerpts of the new book, shared by the Metro, the 50-year-old actor writers: "I was blackmailed into having sex for the first time when I was 15. I was certain I was going to hell for the premarital sex.
"Today, I am merely certain that I hope that’s not the case."
The star then adds: "I was molested by a man when I was 18 while knocked unconscious in the back of a van."
However, despite detailing the shocking incidents, the Dallas Buyers Club actor writes: "I’ve never felt like a victim. I have a lot of proof that the world is conspiring to make me happy."
The Hollywood icon also recalls some of his bizarre experiences throughout his life.
"I’ve had seventy-eight stitches sewn into my forehead by a veterinarian. I’ve had four concussions from falling out of four trees, three of them on a full moon," he writes.
"I’ve bongoed naked until the cops arrested me. I resisted arrest. I applied to Duke, UT Austin, Southern Methodist, and Grambling for my college education. I got accepted to three out of the four."
Elsewhere in his memoirs, McConaughey opens up about his parents' turbulent relationship and revealed that his father, James McConaughey, died in 1992 while having sex with his mom.
The Interstellar star writes: "I got a call from my Mom. 'Your dad died.' My knees buckled. I couldn’t believe it. He was my dad. Nobody or nothing could kill him.
"Except mom."
The star then reveals that James had always told Matthew and his brothers that he would die while in bed with their mom. As Matthew explains:
"He'd always told me and my brothers, 'Boys, when I go, I’m gonna be makin' love to your mother.' And that's what happened. He had a heart attack when he climaxed."
Promoting his new book as part of a cover story with People, McConaughey admits that his parents had a tumultuous relationship - marrying each other three separate times. But he says that all the bad times were "superseded by the love".
He said: "Look, they were, at times, violent. As I say in the book, that is how they communicated. They were divorced twice, married three times, I mean, yeah, it was like the Pacific Ocean in a storm, you know?
"But as I say in the book, those moments were so quickly - always, 100% of the time - so quickly superseded by the love and the humanity."
Speaking about his own marriage with his wife Camila, 37, McConaughey revealed that he cannot remember the last time he raised his voice, adding: "We have a love that we never question."