In the early years of his career, Jack Nicholson purportedly experienced “homoerotic fantasies” as a result of his serious drug addiction.

According to a new biography, the 76-year-old actor started using drugs ‘with LSD in the early 1960s.’

The ‘The shining’ actor apparently had “castration fantasies” as a result of his alleged drug misuse, according to Marc Eliot’s book, the Mirror said.

Excerpts from The National Enquirer and Radar Online claim that Nicholson “believed after taking it [LSD] the first time that he had seen the face of God”.

Eliot also writes: “He also had castration fantasies, homoerotic fantasies, and revelations about not being wanted as an infant.”

The iconic Hollywood star is also alleged to have revelations about not being wanted as an infant and using drugs while writing scripts.

Eliot also claims Nicholson wrote the screenplay for the cult 1967 film The Trip while ‘on acid’ and ‘regularly got stoned and dropped acid’ while writing The Monkees psychedelic adventure comedy film Head the following year.

Eliot, a New York Times bestselling author, also alleges that Nicholson smoked marijuana with a friend while filming The Last Detail in 1973.

And Nicholson is alleged to have met potential investors for the cult Peter Fonda and Dennis Hopper film Easy Rider ‘with a joint’.

In fact, drugs were a constant presence on the Easy Rider set, according to a slew of reports and subsequent comments by the actors themselves.

Nicholson is said to have later admitted: ‘Being stoned has helped me creatively [with] writing… it’s easier to entertain yourself mentally.’

In the book it’s alleged he took cocaine to get through a crying scene in 1970 drama Five Easy Pieces, according to ex-girlfriend Susan Anspach.

The One Flew Over The Cuckoo’s Nest star also controversially told People magazine that drugs “ain’t no big thing” in an interview in 1980.

“I still love to get high, I’d say, about four days a week. I think that’s about average for an American,” he said at the time.

Adding: “I don’t advocate anything for anybody. But I choose always to be candid because I don’t like the closet atmosphere of drugging.

“In other words, it ain’t no big thing. You can wreck yourself with it, but Christ, you can wreck yourself with anything.”

Eliot writes that the legendary hellraiser began to curtail his excesses after the death of several close friends, physical problems and realising ‘his drug use was taking a toll on his career.’

Apparently Nicholson lost out on the role of Rooster Hannigan in Annie because Carol Burnett, who played Mrs Hannigan, was a stringent anti-drug crusader.

‘One of the toughest parts of ageing is losing your friends,’ Nicholson told The Daily Mail back in 2011. ‘At first it starts quietly, then pretty soon it’s every month, and you can’t help but think, “When is that bell going to go off for me?” And on top of that you feel this constant loss.

‘At this time of life, you feel just a sword’s point from death. It’s frightening – who wants to face God and the clear white light? I know I definitely don’t. Yet.’

He reportedly stopped using drugs some time in the 80s or 90s following “physical problems”, according to a number of reports.