Meghan Markle's half-brother Thomas Markle Jr. is set to rub shoulders with Hollywood royalty Caitlyn Jenner in Big Brother's VIP show - a leaked cast list has revealed.

The show was due to start filming in Sydney's Olympic Park but is said to be two-days ahead of schedule and the leaked list of stars has now been shared in an exclusive with The Daily Mail Australia.

Thomas Markle Jr, 55, replaces outspoken Katie Hopkins who was sent back to the UK for threatening to break quarantine rules.

The half-brother of Meghan, who share the same father Thomas Markle, hit the headlines before the wedding advising against her historic marriage to Prince Harry.

The pair are now said to be estranged.

Thomas Markle Jr. is said to be appearing on BB VIP down under (

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Getty Images)

Thomas will be rubbing shoulders with reality TV veteran Caitlyn Jenner in the famous house.

Joining Thomas Markle Jr and Caitlyn Jenner will be Married At First Sight star Jessika Power.

Former advisor to Donald Trump, Omarosa Manigault Newman, is also said to be appearing on the show, and is best known for her stint as a contestant on The Apprentice.

Caitlyn Jenner is trying out a new reality TV show following KUWTK and her success on I'm A Celeb

Other boys entering the famous Big Brotherpad include former footy players Matt Cooper and Dayne Beams.

Matt, 46, played his entire NRL career for the St. George Illawarra Dragons, with whom he won the 2010 NRL grand final.

While Collingwood AFL player Dayne Beams, 31, is making a TV debut.

Trump and Omarosa Manigault-Newman were previously locked in a very public battle (

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GETTY)

But housemate Luke Toki is a reality pro after appearing on Australian Survivor in 2017, and Australian Survivor: Champions v Contenders in 2019.

Also joining them are Wentworth actor Bernard Curry and Ellie Gonsalves who is best known for her role in Fighting with My Family.

Daily Mail Australia announced Ellie would be joining the serieson Friday, after an insider left slip she was in Sydney for the series.

Hottie model Josh Carroll will bring his stunning good looks to the line-up.

And blonde beauty Imogen Anthony will make her reality TV debut on the upcoming series.

Big Brother VIP will air on Channel Seven later this year