Iconic American actor Kevin Spacey has responded to allegations made by actor Anthony Rapp that he assaulted him when he was just 14.

Star Trek actor Rapp had claimed that Spacey had assaulted back in 1986 at a party in New York.

In a statement, he said he did not remember the incident but if it did happen it was likely “deeply inappropriate drunken behaviour” for which he sincerely apologises.

In an interview with BuzzFeed, Rapp alleged that Spacey, then 26, invited him and a 17-year-old friend to a nightclub, despite both being visibly underage, during which they were entertained in the VIP area by Spacey.

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Rapp said Spacey then followed up with an invitation to a party at his Manhattan apartment, which Rapp attended.

Rapp said he spent much of the party “kind of bored” and watching television in the bedroom until late into the night, before noticing Spacey standing at the bedroom door and realising all the other guests had left the party.

He said Spacey “sort of stood in the doorway, kind of swaying. My impression when he came in the room was that he was drunk … He picked me up like a groom picks up the bride over the threshold. But I don’t, like, squirm away initially, because I’m like, ‘What’s going on?’ And then he lays down on top of me.”

Rapp described the experience as “a frozen moment … In terms of fight or flight or freeze, I tend to freeze.”

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Rapp said he believed Spacey was trying to “seduce” him but that he was able to “squirm” away soon afterwards, closing himself in the bathroom before telling Spacey he was leaving. “As I opened the door to leave, he was leaning on the front door[frame]. And he was like, ‘Are you sure you wanna go?’ I said, ‘Yes, good night,’ and then I did leave,” Rapp said.

Spacey’s full statement read: “I honestly do not remember the encounter, it would have been over 30 years ago. But if I did behave then as he describes, I owe him the sincerest apology for what would have been deeply inappropriate drunken behavior, and I am sorry for the feelings he describes having carried with him all these years.”

It adds:  “As those closest to me know, in my life I have had relationships with both men and women. I have loved and had romantic encounters with men throughout my life, and I choose now to live as a gay man. I want to deal with this honestly and openly and that starts with examining my own behaviour.”

On Rapp’s part, he says he considered talking to Spacey about the encounter but never did. He also considered legal action, but was advised he did not have grounds to make a case. He had previously told the story, with Spacey’s name removed, to the Advocate in 2001.