Hollywood actor Rebel Wilson has slammed what she calls the “shockingly unethical behaviour and malicious takedowns” by publisher Bauer Media, as she applies to take her defamation saga to Australia’s highest court.

The Pitch Perfect star lodged an application with the High Court on Wednesday for leave to appeal, after she was forced to repay almost 90 per cent of her record $4.7 million payout to the Woman’s Day publisher that defamed her.

Bauer Media has said little on the application.

“We are considering the issues raised by Ms Wilson and our position in relation to them,” Bauer’s lawyer Adrian Goss said in a statement on Friday.

Late on Thursday Wilson took to Twitter to announce to fans “I’m here to see this out til the end”.

“Thanks to everyone for your kind support re my defamation case in Australia and to those who have reached out who also plan to take their matters against this tabloid company ‘Bauer Media’ to court because of shockingly unethical behaviour and malicious takedowns,” she wrote.

“Going to court is not fun in any way and it’s ridiculously hard to be one individual against a billionaire corporation… but obviously I couldn’t let what happen stand and won’t let their constant bullying, intimidation and harassment scare me.”

During her defamation trial in the Supreme Court of Victoria last year, Wilson proved “vulture” journalists from Bauer had painted her a serial liar about her real name, age and childhood in order to make it in Hollywood.

Despite Justice John Dixon awarding the Los Angeles-based star the record-breaking damages payout, Bauer successfully appealed the dollar figure.

The Court of Appeal determined Wilson couldn’t prove economic loss or that she missed out on film contracts as a result of the Bauer articles.

In her social media post, Wilson added Bauer could have settled the matter for $200,000 before it got to court, but said it “continued to do the wrong thing” and “all to make a profit”.

“I’m glad I had the guts to stand up to them and openly expose their dodgy practices in court,” she said.

“…it’s just a shame that this damages award for economic loss still lingers on the case but I’m here to see this out til the end.”

If her application is successful, Wilson’s fight could end up in Canberra before a full bench of the High Court.

In a separate case, Bauer is being sued for defamation by a Melbourne woman who claims the publisher posted damning information about her on social media, News Corp reported on Thursday.

-AAP