Jack Nicholson Thought His Mom Was His Sister for Nearly 4 Decades – How He Finally Learned the Truth

By his late 30s, the actor had built a formidable career in Hollywood, but away from the cameras, part of his own story remained hidden from him. The secret had survived his childhood, his move to Los Angeles, and his rise to fame before it finally unraveled.

Long before Jack Nicholson became one of Hollywood's most recognizable actors, his family had made a decision that would shape his understanding of his childhood for decades.

The arrangement began before he was born and involved several members of his family maintaining the same story. It was not until Hollywood success brought greater scrutiny to his background that he learned how much had been kept from him.

The Family Secret

The circumstances dated back to 1936, when Jack's biological mother, June, became pregnant at 18. To make matters more complicated, her boyfriend at the time, Don, was married to another woman.

June's mother, Ethel May, responded by ordering Don to stay away from her daughter. She threatened him with the Mann Act — a federal law created to combat trafficking and prostitution involving women and girls — as well.

The federal law was also used historically to prosecute some consensual relationships. As for Jack, he was later born in Neptune, New Jersey, in 1937.

However, with June so young, unmarried, and hoping to pursue a career in entertainment, the family concealed the circumstances of his birth. Instead, Ethel May raised Jack as though he were her own son, meaning he grew up believing that she was his mother.

June, meanwhile, was presented to him as his much older sister, and no one told Jack otherwise. As for the actor's biological father, he was absent from Jack's childhood.

That attention ultimately exposed the secret his family had managed to protect throughout his entire childhood and early adulthood.

In his place, Shorty, the husband of Jack's aunt Lorraine, became a father figure in the actor's life. And so, the unusual family structure continued even after June left home when Jack was four years old.

She moved to Miami and pursued work as an Earl Carroll showgirl, leaving her biological son to continue growing up without knowing their actual relationship. Years later, their paths would converge again for an entirely different reason.

Jack Followed His 'Sister' to Hollywood

At 17, Jack decided to pursue opportunities in Los Angeles, where June had already moved while trying to establish herself in show business. From his perspective at the time, he was simply following one of the closest relatives he had. He recalled to "Rolling Stone" in 1986:

"And since my only relative in the world was June, who was out here, I came out to look around."

Once in California, he found work at MGM Studios as an office boy in the animation department. His personality eventually attracted the attention of a producer, who encouraged him to take acting classes. The move proved consequential.

Jack steadily built a film career, and by the 1970s, his profile had risen dramatically. Yet the more famous he became, the more interest there was in the man behind the performances. That attention ultimately exposed the secret his family had managed to protect throughout his entire childhood and early adulthood.

A Magazine Fact-Check Changed Everything

In 1974, Jack was 37 and preparing for the release of "Chinatown" when Time magazine began working on a profile of him. The actor had been remarkably prolific, and the magazine prepared to feature him under the cover line "The Star with the Killer Smile."

Before publication, however, researchers from Time contacted Jack while checking details about his background. What began as routine fact-checking quickly became something far more personal.

According to the account, the Hollywood star was first told that the man identified as his father was still alive and living in Ocean Grove, New Jersey. Then came the revelation that fundamentally changed what he understood about his family.

It would come to light that Ethel May, whom he had believed was his mother, was actually his grandmother, while June, whom he had known as his sister, was his biological mother.

Jack asked the magazine not to include the discoveries in its story. He then turned to the people who could tell him whether what he had just heard was true.

According to Patrick McGilligan's biography "Jack's Life," the "As Good as It Gets" star called Shorty and said to him, "Shorty, this is the most [expletive] thing I've ever heard." He then relayed what the magazine had told him:

"A guy calls me on the phone, and says that my father is still alive, and that Ethel May wasn't really my mother — that June was my mother."

Shorty initially denied the story before eventually passing the telephone to Lorraine. She confirmed that Ethel May had indeed been Jack's grandmother and June his mother.

One question, however, remained unresolved. Lorraine could not confirm whether Don Furcillo-Rose, the man reportedly living in New Jersey, was actually Jack's biological father.

He Could No Longer Ask His Mother or Grandmother

For Jack, there was also no longer any opportunity to ask the two women at the center of the secret why they had maintained it for so long. Both June and Ethel May had died before he learned the truth, leaving him unable to confront either woman or hear their explanations firsthand.

The revelation nevertheless affected him as he continued working. The actor subsequently made "The Fortune," and after learning about his family history, he asked director Mike Nichols to keep a close watch on him during the production.

Although the discovery initially sent him reeling, Jack later distinguished between his initial reaction to the revelation and its lasting effect on him. Over time, his reaction also included a degree of amazement, as he revealed:

"I was very impressed by their ability to keep the secret, if nothing else. It's done great things for me."

Jack Nicholson occasionally referred to June as his "sister-mother" when discussing the unusual circumstances in later years, but he largely refrained from speaking extensively about the subject.

Thus, what he had believed for almost four decades had begun as a decision made before he was even born. And by the time he discovered the truth, both women who could have explained that decision in their own words were already gone.