The teenage daughter of a controversial Queensland MP has reportedly converted to Islam and married a man who is her co-accused in a cocaine trial.

Brianna Costigan, 19, the daughter of embattled Whitsundays MP Jason, faces charges related to drug dealing in Sydney.

© Provided by Daily Mail Brianna Costigan announced her conversion to Islam and marriage to co-accused Ahmed Taha in a surprising Instagram post (pictured), and is now calling herself Brianna Taha

The glamorous student changed her name to 'Brianna Taha' and appeared to share a picture of herself praising Allah while posing in a Burberry headscarf.

Alongside the surprise picture, posted on an Instagram page apparently belonging to her, she wrote: 'Never question God’s plan #alhamdulillahforeverything'.

She deleted all of her other pictures, with her profile now saying she is 'married' and a 'law student'.

The teenager appeared in court in November accused of being a member of a dial-a-dealer cocaine syndicate.

A student at UNSW, she is charged with two counts of supplying cocaine and knowingly taking part in supplying 2.31g on three or more occasions.

Her co-accused and now reported husband, Ahmed Taha, 26, faces 14 charges in total.

Six of those charges relate to the supply of cocaine between Pyrmont and Maroubra.

© Provided by Daily Mail The 19-year-old UNSW law student (pictured) is charged with two counts of supplying cocaine

© Provided by Daily Mail Her father is Queensland member of the Whitsundays Jason Costigan (pictured) who is himself a controversial figure

Costigan was arrested in September following a police operation targeted at cocaine dealers throughout Sydney.

She and her alleged accomplice are accused of dealing cocaine while unknowingly talking to undercover detectives.

Her lawyer previously argued in court she was 'not the brains of the operation'.

The court also heard she was relying on the income made from dealing drugs while studying her full time law degree at university.

© Provided by Daily Mail The teenager (pictured) is accused of being a member of a dial-a-dealer syndicate but has since married her co-accused

Before she moved to Sydney, the teenager expressed an interest in local politics like her father.

She was a youth member for the Whitsundays, with her father is the region's representative in the Legislative Assembly of Queensland.

In January, Mr Costigan was expelled from the Liberal Party following accusations he harassed an 18-year-old woman.

She claimed he 'stroked her on the back and hair'. Mr Costigan denied the allegations.

© Provided by Daily Mail Brianna Costigan (pictured with her dog) appeared in court in November on cocaine charges

Queensland's LNP booted out the embattled MP in January, insisting it was the right thing to do even though it will now be harder to win the next state election.

A second young woman, aged 20, later made a similar complaint of predatory behaviour relating to text messages she says she received from him last year.

However, MP Costigan later announced that he will not resign despite being expelled from the LNP, tweeting: 'I will NOT be resigning! #qldpol #auspol #costo2020'

Details of the claims have not been publicly released and party leader Deb Frecklington says they will remain confidential.

She called on the MP to resign from parliament.

'He has disgraced the office and he should go now,' she told reporters.

The LNP received the second complaint as Mr Costigan was strenuously denying on any wrongdoing relating to the first complaint.

He showed a selfie he had taken with the girl to the media at that press conference, and called her claims 'crap'.

It was reported that the 18-year-old's mother sent an email to the LNP after Mr Costigan took topless selfies with the teenager.

The mother called Mr Costigan's behaviour 'extraordinary'.