Lindsay Lohan's family is planning to stage an intervention.

Lindsay's father Michael Lohan - who claims she is addicted to prescription medication - revealed he and her mother Dina are concerned the star's life is spiralling out of control and have discussed forcing their daughter to get professional help.

Michael said: "I had a conversation with her, her mother and everyone. Over the next couple of weeks I'm going to be doing things in a pretty public way.

"But Dina has got to get on the same page with me. It's a serious situation. You can't just talk about it and tell me that you want to do an intervention and then do nothing."

It has been claimed Lindsay - who has completed three previous stints in rehab - is addicted to a cocktail of different prescription medications.

Among the pills she apparently takes are Attention Deficit Disorder medication Adderall, anti-depressant Zoloft and pills to treat anxiety and bi-polar disorder.

Michael says he has been forced to speak out publicly about his 23-year-old daughter's substance problem as it is the only way to make her pay attention to him.

He explained to website RadarOnline: "When Lindsay doesn't adhere or listen to what I say about serious situations, I feel I have to speak publicly to put pressure on her. If she doesn't take my advice and do what I say... the more pressure I put on her, the more likely she is to eventually do the right thing."

Meanwhile, it has been claimed Lindsay is close to having a mental breakdown.

A source told gossip website X17online: "Lindsay is so close to going to rehab, but what she really needs is something way more than most rehabs can offer. This is way beyond just drugs and alcohol."