With a full face of glam and her entourage in tow, Rebel Wilson beamed at the press pack as she entered Sydney's Federal Court for a defamation showdown with a young actor.

She was poised and ready for a long day of truth-telling. 'All I have done is tell the truth, at significant cost to myself, at significant detriment,' she told the court.

But each day, as soon as she passed through security and beyond the cameras' view, her confidence seemed to slip.

She looked isolated, appearing to lack the supporters rallying behind her opponents. On some days, it seemed only those paid to attend were speaking to her. 

Once inside the elevator on Wednesday, there was confusion over what button to press. She addressed her staff, 'Is it 22? I think it's 22.' Her bodyguard panicked and agreed, her celebrity hairdresser smoothed her tresses.

Before Wilson took everyone to the wrong floor, the Daily Mail informed her that the courtroom was on level 21. Once inside the witness box, her confusion did not wane.

She was hit with a barrage of questions by Sue Chrysanthou SC - the barrister representing Charlotte MacInnes, the star of Wilson's directorial debut, The Deb - who seemed cranky with her from the moment cross-examination began.

And it was little wonder why. When shown a series of her own emails and messages to cast, crew and financiers that fell somewhere between curt and 'deranged', Wilson insisted she didn't see the issue.

Other parts of her evidence verged on conspiracy - namely, the bizarre claim that her legal opponents flew to Sydney on billionaire and film financier Sir Len Blavatnik's private jet, which the Mail has independently confirmed as false. 

Wilson referenced The Deb's senior producer Amanda Ghost and her celebrity lawyer, Camille Vasquez, who represented Johnny Depp in his marathon defamation case against his ex-wife, Amber Heard.

Ghost is central to MacInnes' defamation case against Wilson. In the reverse #MeToo lawsuit, Wilson insists that MacInnes was sexually harassed by Ghost in a bathtub. MacInnes and Ghost deny that any harassment occurred. 

Wilson then splashed the alleged harassment all over Instagram, accusing MacInnes of rescinding her sexual assault complaint in exchange for a music deal and a lead role in another of Ghost's productions. MacInnes also denies this.

Wilson has also levelled a tranche of criminal claims against Ghost, her husband, Gregor Cameron, and another of The Deb's co-producers, Vince Holden - all of which are now the subject of two other defamation cases against Wilson.

With so much litigation flying around, it's easy to see how Wilson might think everyone is against her; the majority of people in the court's public gallery this week were either suing her, or supporting those suing her.

But her suggestion that her opponents had all used Blavatnik's billions to gang up on her was steeped in intuition. She even had a name for them, 'Team Russian Oligarch'.

Probed on why she thought her opponents used Blavatnik's private jet, Wilson reasoned they all arrived in Sydney around the same time.

Chrysanthou asked: 'Are you suggesting that lawyers acting for Ms MacInnes arrived on a private jet in Sydney?'

Wilson replied: 'I'm suggesting that people on the team of a Russian oligarch billionaire arrived in Sydney a week ago.' 

Chrysanthou said: 'So you've made claims from the witness box about people associated with the team of a billionaire?'

Wilson retorted: 'So it's just a coincidence that his plane arrived in Sydney?

'It's obvious to assume that what I referred to as "Team Russian Oligarch" are the team behind these proceedings.'

The Mail has confirmed it really was a coincidence - if Blavatnik's jet was in Sydney at all. Vasquez and Ghost booked business-class return flights with Qantas. 

Vasquez left Los Angeles at 11.30pm on April 19, landing at 7.30am on April 21. She returned home on Thursday. Ghost left London at 8.50pm on April 18 and landed in Sydney at 5.10am on April 20. She will return home over the weekend.

Emails released by the Federal Court also show that Wilson knew MacInnes' legal fees were not being covered by Blavatnik before she made the claim in court.

Chrysanthou asked Wilson if her intuition had formed the basis of any other claims made during legal proceedings, but Wilson insisted her evidence was 'based on my truthful recollection'.

'Sometimes I’m reminded by documents. Sometimes I would say one and one makes two, and make a logical decision about things,' she said.

Wilson's delivery was consistently deadpan. While her nerves showed a little with stifled answers on the first day, she seemed to find her stride by day two - even as her outbursts were shown to the court.

One text with film and TV producer Greer Simpkin started as a warm exchange about a family photo, before it rapidly declined.

Wilson sent the photo in the early hours of a morning in August 2023, during pre-production for The Deb. Simpkin replied: 'Awww that is beautiful! Is the gorgeous lady in the floral dress your mum? I hope [your wife] Romona is loving the view!'

Wilson replied: 'Yes that's mum.'

Simpkin wrote: 'That's where your beautiful skin comes from. She is gorgeous.'

Little more than two hours later, close to 4am, Wilson fired off a furious message: 'Yes I noticed myself and [my production company] Camp Sugar are not listed in the producing section...who did this?'

Without waiting for a response, she wrote: 'DO NOT let this happen again. It's extremely disrespectful.'

Simpkin explained it was an accident by an exhausted worker who was very apologetic. 'I won't let it happen again. It is certainly not my style. Let's talk on Monday,' she wrote. 

Court documents also show relationships were pushed to the edge when Wilson started demanding a writing credit alongside The Deb's original writer, Hannah Reilly.

Her existing credits comprising co-producer, actor and director of The Deb were seemingly not enough.

Wilson had mentored Reilly in 2019, but that didn't stop her from launching a legal bid for 50 per cent of her writing fee for the film.

During pre-production in September 2023, Wilson wrote to Simpkin: 'That Hannah can f*** right off.' Simpkin agreed.

In an email to an intellectual property lawyer a month later, Wilson wrote: 'I will obviously be claiming a shared writing credit for the screenplay with Hannah Reilly after completing four drafts on the script.

'I will be claiming 50 per cent of the screenplay has been written by me... I would not at all be approving of Hannah to be paid 100 per cent of the total fee.'

Days before Christmas in 2023, she fired off another furious email to Reilly's literary agent, slamming Reilly as 'ungrateful' for the 'generosity' Wilson had shown, and telling her agent the film would never have been funded if Reilly was the sole writer.

Wilson claimed Reilly had been 'difficult to work with' and had been 'extremely ungrateful for the opportunity that has been given to her'.

'She has a history of not valuing others' creative inputs which is against everything I stand for. It is also, quite frankly, deluded.

'If it was unclear about my personal feelings towards your client, I hope this email gives you some clarity.'

Wilson signed the email off with: 'Merry Christmas!'

Once arbitrators ruled in Reilly's favour in 2024, Wilson wrote a scathing email to executive producer Danny Cohen, falsely claiming Reilly had fabricated documents and threatening to sue her own film over the situation.

That same year, according to documents tendered in court, Wilson wrote to Blavatnik with a series of allegations against film producers Ghost and her husband, Gregor Cameron.

She accused them of stealing writing credits from Shakira, Baz Luhrmann, James Blunt and FKA Twigs.

Wilson wrote: 'Dearest Len - All these people can't be wrong.

'I have nothing to gain by telling you of the inappropriate behaviour primarily of Amanda and Gregor but also of Vince.

'I have worked hard to make you a profit and create a great film.' 

Wilson said the couple 'leave a path of destruction' and claimed to know they were telling him 'absolute lies'.

Blavatnik replied: 'Dear Rebel - please, let's just focus on promoting/selling the movie. If that's successfully done, other issues can be dealt with.'

The following day, she accused him of orchestrating a PR attack.

The relationship breakdowns could also be seen in the courtroom. 

When Wilson told the court she had information on MacInnes' whereabouts from users of a hate group called the 'I hate Amanda Ghost fan club', Ghost stifled a laugh from the public gallery.

During adjournments, MacInnes and her boyfriend Carlo Boumouglbay often sat with Ghost, laughed with her, and smiled as they shared various things on their phones.

Whatever might have happened between Ghost and MacInnes is evidently water under the bridge now.

They could be seen smiling together as they left the court on Thursday evening, while Wilson remained cooped up in a witness room, where she spent her breaks.

It was dark by the time Wilson left court on Thursday, surrounded only by her make-up artist, hairstylist, lawyer, and bodyguard.

Earlier during the hearing, Wilson's team had partied at the Caterpillar Club, a trendy bar in the middle of the CBD. After such bruising cross-examination by Chrysanthou this week, I'd be surprised if they were in the mood to celebrate again.