Actress Anjelica Huston is still waiting for an apology from ex-boyfriend Ryan O'Neal after he allegedly headbutted her during a fight in the late 1970s.

The Witches star went public with details about their tumultuous romance in her new memoir, Watch Me, in which she claimed the Love Story actor attacked her after she failed to immediately return from the bathroom while they were attending a party in Beverly Hills, California.

In her book, she writes, "He turned on me, grabbed me by the hair and hit me in the forehead with the top of his skull... I saw stars and reeled back. Half blind, I ran away from him."

She goes on to accuse O'Neal of lashing out at her again moments later, which prompted her to end the relationship for good.

However, Huston reveals the actor has never attempted to clear the air with his ex - and decades later, she has yet to receive an apology for his alleged bad behaviour.

During an appearance on U.S. talk show Watch What Happens Live, the Oscar winner was asked what she would say to O'Neal if she met him at a party now and she replied, "I'd say, 'Do you want to apologise? Isn't it time?'"