The tragic drowning death of Hollywood icon Natalie Wood in 1981 has remained a baffling puzzle for over forty years.

However, Lana Wood, Natalie’s sister, firmly points the finger at one individual for the demise of the renowned “West Side Story” actress – Natalie’s husband, Robert Wagner.

In an exclusive interview with The Post, Lana, aged 75, expressed her conviction, stating, “I don’t believe it was premeditated, but that doesn’t mean I don’t think he did it: Of course he did!”

Lana has now authored a book titled “Little Sister: My Investigation into the Mysterious Death of Natalie Wood,” released on Tuesday.

This unique piece combines personal reflections with a meticulous examination of new evidence unearthed by homicide investigators, aiming to debunk myths and shed light on the truth behind Natalie’s untimely passing.

Within the pages of her book, Lana also unveils a shocking revelation regarding actor Kirk Douglas, alleging that he s**ually assaulted a teenage Natalie, thus confirming a long-standing rumor within the Hollywood industry.

The narrative delves into an incident where Natalie, at sixteen years old, was reportedly coerced by their mother, Maria, to meet Douglas at the Chateau Marmont, a prominent actor at the time.

Following the encounter, Natalie disclosed to Lana that she had been subjected to a distressing ordeal at the hands of Kirk Douglas.

Lana vividly recalls the emotional toll this incident took on Natalie, shaping her perception of the world and instilling a deep-rooted distrust of men.

These revelations serve as a poignant backdrop to Lana’s claims surrounding Natalie’s tragic demise.

On a fateful morning in November 1981, Lana was jolted awake in her Los Angeles residence by a piercing scream and a ringing phone.

The news of Natalie’s demise on Catalina Island sent shockwaves through the family, with initial reports suggesting that she had vanished from a yacht, only to be discovered lifeless the following day.

Despite conflicting accounts from Wagner, Walken, and the yacht’s skipper, Lana remains steadfast in her doubts regarding the circumstances surrounding Natalie’s death.

Lana’s pursuit of closure led her to confront Wagner, only to be met with evasive responses and a sudden estrangement from him.

A decade after Natalie’s passing, a pivotal revelation emerged from the yacht’s skipper, Dennis Davern, reigniting the investigation.

Subsequent developments prompted the Los Angeles County Sheriff’s Department to reclassify the case as “suspicious” and designate Wagner as a “person of interest.”

Through her book, Lana advocates for justice, driven by a profound sense of duty towards her late sister.

The narrative not only unravels the mysteries shrouding Natalie’s death but also pays homage to her enduring legacy.

Natalie Wood’s remarkable journey from a young actress to a Hollywood luminary is immortalized in Lana’s poignant recollections, portraying a bond that transcends time and tragedy.