Actor Geoffrey Rush has told the judge hearing his defamation case that he felt distraught and as though his head was “filled with lead” upon seeing a newspaper article alleging he had behaved inappropriately towards a female co-star.

The Oscar-winner is suing the publishers of Sydney’s Daily Telegraph and its journalist Jonathon Moran over the articles published last year.

He denies all the allegations.

Documents presented in court by the defence say the allegations concern Mr Rush’s behaviour towards his co-star Eryn Jean Norvill during a Sydney Theatre Company production of King Lear in 2015 and 2016.

The documents allege Mr Rush made lewd gestures in her direction, simulated fondling and groping her breasts, and regularly made comments or jokes about her involving sexual innuendo.

He was also accused of touching her lower back under her shirt when they were backstage, and tracing his hand down her torso and across the side of her breast during a scene in which he was carrying her.

Mr Rush entered Sydney’s Federal Court alongside his wife Jane Menelaus for the start of the judge-only hearing.

Later, he testified that he was devastated when he saw the Telegraph’s first article last November – beside a headline of “King Leer” – while his wife and adult son were home.

“I could see how distressed they were, which created a great deal of hurt for me,” Mr Rush told the court.

“I felt as though someone had poured lead into my head. I went into a kind of, ‘This can’t be happening.'”

The actor said when the paper ran its second article he felt “distraught by the way the story was running off the rails and didn’t seem to reflect anything I experienced”.

“My blood ran cold and I went to jelly as I thought, ‘this is the beginning of a box set, this story is going to continue and it’s wilder than you think, dear reader’,” Mr Rush said.

Mr Rush’s lawyer Bruce McClintock told the hearing his client was “a national living treasure”.

“As well as giving pleasure to millions, his reputation was stellar, it could not have been higher. No scandal attached to his name,” Mr McClintock said.

That changed once the newspaper chose to publish, the lawyer said in his opening remarks, saying the cumulative effect of the two Telegraph articles, and an advertising poster highlighting them, was to “smash and destroy my client’s reputation”.

He accused Mr Moran of including “straight-out, bald-faced” lies in his reporting. Defence barrister Tom Blackburn later said this was nothing more than a submission.

“It’s not based on any evidence because no evidence has been heard,” Mr Blackburn said.

The Telegraph intends to use Ms Norvill’s sworn statement in its defence, and Ms Norvill is expected to testify.

The defence claims Mr Rush knew he did not have Norvill’s consent and knew that on the occasions the behaviour occurred in front of an audience, she could do nothing to prevent it.

Mr Rush also told the court the articles did not relate to the “very strenuous but very cheerful” experience he had working on the play, and that as far as he was concerned, he and Ms Norvill had enjoyed a “very sparky, congenial rapport”.

The hearing, scheduled to last 13 days, continues on Tuesday with Mr Rush expected to continue giving evidence.

Rush, 67, won the best actor Oscar in 1996 for his portrayal of pianist David Helfgott in Shine and was nominated for roles in Shakespeare In Love, Quills and The King’s Speech. He is also famed for his portrayal of Captain Barbossa in the Pirates Of The Caribbean films.

He received his country’s highest civilian honour in 2014, the Companion of the Order of Australia for service to the arts.