Lindsay Lohan has described her father as a “lunatic” during an angry outburst on Twitter.

The 23-year-old actress hit out against her dad, Michael, amid reports he was seeking to gain conservatorship over her.

"My father is a lunatic & doesn't even deserve such a title since he's never been around in my life other than when he'd threaten me & my family," she wrote.

"He should be where he has always put himself after verbally abusing and physically abusing people all my life-behind bars."

Michael Lohan has been increasingly vocal about his concerns for his daughter in recent weeks.

And the actress revealed that his comments, which included comparing her to Elvis, had even upset her 15-year-old sister, Ali.

"It's so sad to get a phone call from my baby sister just now asking, 'why is daddy doing this?',” Lohan wrote.

“Through tears. He's crossed the lines & hurt me & my family 4 the last time."

In a recent interview, Lohan revealed she had not spoken to her father since August.

Lindsay Lohan