Lohan's father says his wife's drinking caused star's latest troubles

The father of troubled Hollywood actress Lindsay Lohan is trying to force her mother to undergo drug testing.

Former stockbroker Michael Lohan - who has served two prison sentences for contempt of court, driving without a licence and attempted assault - is asking a court in New York State to order his estranged wife Dina to submit to the tests.

Mr Lohan claims Dina's drinking has contributed to Lindsay's recent troubles - which include her latest spell in rehab after crashing her Mercedes and being arrested on suspicion of drink-driving and possession of cocaine.

He is currently being divorced by Dina, and has said he believes his daughter's problems with alcohol can be traced back to his own past drug use.

He is also battling for visiting rights to see his two younger children, Aliana and Dakota.

Mr Lohan said: "I do not believe Dina should be drinking in front of our daughter.

"If she continues to do this, I guarantee Lindsay will fall apart again."

The 47-year-old claims he overcame his own addiction problems after serving time in prison.

He is willing to undergo court-supervised drug tests but says Dina has "refused" them.

He said: "Back when Dina and I met in the Eighties, everyone was partying and using cocaine.

"I am now clean and sober. I submit to drug and alcohol testing three times a week, because I am on parole and because I now work as a drug counsellor with teenagers.

"I am willing to be tested by the court all day, every day of the week. I know I will come up clean.

"But when my lawyers sat with Dina's lawyers, and said I was willing to be tested, she said she was reluctant to be tested."

Mr Lohan and his difficult relationship with his 21-year-old daughter have previously been widely viewed as a major cause of her problems.

Lindsay, who starred in the movies Mean Girls and Freaky Friday, also reportedly got into a shouting match at a recent birthday party for her mother at a Manhattan restaurant, where champagne was said to be flowing freely.

Lindsay, who is dating George Best's son Calum, is due in court on August 24 to face charges of drink-driving and drug possession.

She could face up to a year in prison if convicted.

Warren Quaid, Dina Lohan's lawyer, refused to comment on the allegations.