Orange Is The New Black star Yael Stone accuses Geoffrey Rush of inappropriate behaviour.

— With AAP.

Orange is the New Black star Yael Stone has alleged Geoffrey Rush exposed himself to her backstage, attempted to spy on her while she was showering and sent her inappropriate text messages.

In a statement issued this afternoon, Oscar winner Rush has denied the allegations.

Fellow Australian actors Stone and Rush worked together eight years ago in an Australian theatre production of The Diary Of A Madman, when Stone played opposite Rush between 2010 and 2011 in Sydney and later in Brooklyn, New York.

Stone has told The New York Times that Rush danced naked in front of her in a dressing room “in a playful, clownish manner”.

Speaking to Leigh Sales on ABC’s 7.30, Stone explained how Rush entered the shared dressing room.

“I was sitting at the mirrors and he came in from the shower holding his towel and he was naked and he danced around in front of me with his penis out,” she said.

She also alleges he used a small mirror to spy on her in the shower.

Umissable @abc730 tonight – star of Orange is the New Black Yael Stone makes explosive allegations about working with superstar Australian actor Geoffrey Rush.https://t.co/lN8WxNpNmn

— Leigh Sales (@leighsales) December 17, 2018

7.30 have reportedly spoken to one witness who claims to have seen Rush dancing in the Sydney dressing room and attempting to see Stone showering.

Rush also sent Stone text messages that “became more sexual in nature but always encased in this very highfalutin intellectual language” to which, she says, she “enthusiastically and willingly” responded.

Rush allegedly texted Stone frequently, including in the late hours of the night and early in the morning.

“I’m embarrassed by the ways I participated,” Stone told the New York Times.

“I certainly wouldn’t engage as the person I am now in the way I did when I was 25”.

Of the shower incident, Stone says “I said words to the effect of, ‘bugger off Geoffrey'”.

“I was walking a very delicate line where I needed to manage these uncomfortable moments but never, never offend him.”

Rush was accused of inappropriate behaviour last year during a Sydney Theatre company production. Post continues below…

Rush, in a statement to the Times on Monday, said the allegations of inappropriate behaviour were “incorrect and in some instance have been taken completely out of context”.

“However, clearly Yael has been upset on occasion by the spirited enthusiasm I generally bring to my work.

“I sincerely and deeply regret if I have caused her any distress.

“This, most certainly, has never been my intention.”

Rush said he abhorred any behaviour that might be considered as harassment or intimidation.

Rush this year sued Sydney’s The Daily Telegraph for defamation over allegations it made about his behaviour towards one of his co-stars in a separate production. The case outcome is still pending.

Stone, who is the mother of a baby girl, will on Monday night appear on ABC Television’s 7.30.