The estranged husband of Australian singer Sia has asked for more than $250,000 (£187,000; A$384,000) per month in spousal support, according to US court documents.

Best known for her hits including Chandelier and Titanium, the pop star - whose full name is Sia Furler - cited "irreconcilable differences" when she filed for divorce from Daniel Bernard in March.

In court documents, Bernard - a former doctor - said he needed the monthly allowance to maintain the "luxurious and upper-class lifestyle" he had enjoyed during the marriage.

He claimed he was "financially dependent on Sia" after he quit his job to run a short-lived medical business with her, the documents said.

In the court filings, Bernard said the couple, who married in December 2022 and have an 18-month-old son, had more than $400,000 in monthly expenses for private jets, holidays, high-end dining and several full-time staff members.

"We never needed to monitor our living expenses," he wrote. 

The 47-year-old said the temporary support order he is seeking was "necessary" because Sia, 49, was "the breadwinner in our marriage".

A former radiation oncologist, Bernard also said he would need to complete several years of training and pass several rigorous exams before he could renew his certification and practice again.

He also requested additional payments to help cover legal costs and forensic accounting.

Sia's agents have been contacted for comment.