Lindsay Lohan has reportedly been caught taking drugs in rehab.
The 'Mean Girls' star was allegedly forced to undergo a drugs test by staff at Utah's Cirque Lodge facility, and the results came back positive.
Lindsay, 21, has now been warned if she does not stay clean she will be thrown out of the centre.
A source is quoted as saying: "Lindsay got called into the director's office on August 15 and was questioned about drugs. When ordered to take a drug test, she reluctantly complied but screamed and cursed at the medical director before storming out the room. She was told that if she couldn't conform to the programme she'd have to leave."
According to reports it's not Lindsay's first indiscretion since entering Cirque Lodge earlier this month.
She is said to have been caught having sex in a toilet cubicle with a male patient, and is reportedly frequently late to meetings and refuses to do any chores or menial tasks such as washing up.
Lindsay entered the rehab centre following her arrest on July 24 after she crashed her car following a high-speed car chase in Santa Monica. She was in possession of cocaine when she was taken into custody.
Last week, Lindsay pleaded guilty to two charges of being under the influence of a controlled substance (cocaine) and pleaded no contest to two charges of DUI (driving under the influence of alcohol). She also pleaded no contest to one charge of reckless driving.
After entering her plea bargain, she was sentenced to one day in jail and 36 months probation for her offences and ordered to undergo an 18-month alcohol rehabilitation programme.
This is the troubled actress' third stint in rehab. She previously stayed at the Wonderland and Promises facilities in Los Angeles.
Meanwhile, she has agreed to let her estranged father visit her in rehab.
The hasn't seen her father, Michael, for years so the visit will be supervised by her counsellors.
A source told the New York Post newspaper: "It was actually her older brother, Michael's, idea. It's a part of the healing process. Lindsay will see him later this week, but she will have counsellors with her. It will not be alone."
Lindsay's mother, Dina, also approved the visit and has agreed to lift the restraining order against her ex-husband. The order was put in place following Michael's "abusive temper" and "violent behaviour" towards his family.
The source added: "Dina thinks it is a good idea. Lindsay needs to deal with this and needs closure."
Lindsay's representative confirmed the actress has agreed to her father's visit, saying: "Yes, Michael will be seeing his daughter."
Michael, who was released from jail in March after serving almost two years for driving without a licence and attempted assault, insists he has been sober and has found God since leaving prison.
Earlier this month, Michael and Dina reached a divorce agreement.
Michael said: "I wish Dina the best and I hope we can both move forward - for the kids' sake - and just be good parents."
Dina added: "Now the healing process can begin for my children and myself." | 
