Matthew McConaughey's father died while having sex with the actor's mother

Matthew McConaughey's revealing new memoir Greenlights details the death of his father, who he says had a heart attack during intercourse with the actor's mother.  

According to Vanity Fair, McConaughey converted a diary he had been keeping for 36 years into the book, which he wrote alone in the desert with no electricity over a period of 52 days. 

In an excerpt from Greenlights shared with People Magazine, the Dallas Buyers Club star writes about how learned his dad had died in 1992.  

"I got a call from my mom. 'Your dad died,'" McConaughey wrote. 

"My knees buckled. I couldn't believe it. He was my dad. Nobody or nothing could kill him. Except for mom." 

McConaughey explained that his father had a premonition about the way he would die. 

"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," the actor wrote. 

McConaughey also opened up about the volatile nature of his parents' relationship, which saw them divorce and re-marry several times. 

"Those moments were so quickly superseded by the love and humanity," he said during his interview with People.

"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," McConaughey said. 

People described the father-of-three's memoir as "unflinchingly honest and remarkably candid".