SYDNEY: Australian Oscar winner and theatre director Cate Blanchett was "absolutely fine" after suffering a head injury Wednesday when she was hit by a prop during a live performance, reports said.

The incident occurred during "A Streetcar Named Desire" at The Sydney Theatre Company, the Australian Associated Press (AAP) reported.

The theatre's spokesman Tim McKeough told AAP the actress was hit by a radio prop, forcing the performance to be cancelled and the audience cleared.

"There was a minor incident on stage that unfortunately did injure Cate," he said.

A member of the audience told Macquarie Radio network it soon became clear the incident wasn't part of the play.

"She had blood streaming down the back of her head and blood on the back of her neck," she said.

McKeough denied reports the radio prop had been thrown at her.

"That is not correct. There is no point in the show in which the radio is thrown at her," he told AAP. "There was a moment when another actor lifted the prop above his head and she somehow sustained a minor blow to the head."

Blanchett was confident she would be back on stage on Thursday night, he added.