Sylvester Stallone shares harrowing new details about abusive childhood

The action star opened up about a childhood marked by abandonment, violence and an almost total absence of affection in a new interview, telling The New York Times that he deliberately left some of the darkest stories out of his book because he didn't want readers to feel sorry for him.

"I didn't put a lot of stuff in the book because I didn't want a pity party … but it was insane," he admitted.

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Sylvester Stallone reflects on his abusive childhood ahead of the release of his memoir, "The Steps." (Getty Images)

After his parent’s divorce, Stallone spent time living with his father in Maryland. He described his father as volatile and physically abusive.

"The next thing you know — wham! He had very big hands. You just learned to duck a little bit."

One memory particularly stayed with Stallone.

The Hollywood star said his father sent him to a store before church to buy bread. He returned with nut bread after running into friends.

"And he kicked me in the stomach and hit me and like laid me out, got in the car, and went to church."

Stallone said he was left lying in the street, saying, "Really, it's unbelievable. It's unbelievable."

Years later, Stallone confronted his father. When he was in his 40s, Stallone told him, "I wish you and I could be the same age for three minutes." When his father asked him why, he said, "Because I'd like to give you some of your own medicine, and you would know what it'd be like to have your ass kicked."

Stallone said his father then challenged him to fight, explaining, "He was ready to go at 68 years old."

Sylvester Stallone is seen in "Rambo: First Blood Part II." (Nancy Moran/Sygma)

The "Rocky" star connected that fierceness to the one of the characters he's best known for.

"So, when people go, ‘Where do you get the ferocity to play Rambo?' Genetic," he said.

Stallone additionally recalled that his mother never showed affection towards him.

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"My mother never — and my brother will attest — hugged me. Ever, ever," Stallone shared.

His father rarely showed affection either. But when Stallone was about 9, he said he fell asleep in the car after working around his father's horses. His father placed Stallone's head on his knee and rested his hand on his head.

"And I never got over that," he admitted.

Sylvester Stallone, best known for playing Rocky Balboa, is opening up about the abusive childhood that shaped his life. (Getty Images)

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Earlier in the interview, Stallone described being sent to live in a boarding house when he was very young, where his parents visited only once a month.

"I just was raised by strangers, you know, in a boarding house. And it became sort of a natural environment. And my parents were really never nurturing, so this was actually a bonus compared to where I was living."

That emotional deprivation, Stallone acknowledged, shaped the man he became.

When asked whether it made him tough, he replied, "In the wrong way, yeah, it did. It made me very tough."

Sylvester Stallone, seen with wife Jennifer Flavin, credited his family with giving him the stability he lacked growing up. (Ethan Miller/Getty Images)

But the toughness came at a cost. Stallone said he didn't experience what he considers "real, real, real, real true love" until he was around 70, when he experienced it with his wife and kids, saying, "And that's a big pity. It really is."

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Sylvester Stallone poses with wife Jennifer Flavin and their daughters. The Hollywood star has said fatherhood helped reshape his view of family. (Art Streiber/Paramount+.)

Stallone went on to build one of Hollywood's most recognizable careers, writing and starring as Rocky Balboa and going on to play John Rambo. The original "Rocky" received 10 Oscar nominations and won three Academy Awards, including best picture.

Off-screen, Stallone has five children from two of his three marriages.

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Stallone married his first wife, Sasha Czack, in 1974. They divorced in 1985 and shared two sons, Sage and Seargeoh. Stallone married "Rocky IV" co-star Brigitte Nielsen later in 1985, and the couple divorced in 1987.

Stallone married Jennifer Flavin in 1997. They share three daughters, Sophia, Sistine and Scarlet.

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Stephanie Giang-Paunon is an entertainment reporter for Fox News Digital.