Lindsay Lohan was a complete mess on the set of The Canyons over the summer - even by her standards - according to a writer embedded in the indie production.
Stephen Rodrick, who says he was allowed to chronicle the project, says he saw a seemingly drunk LiLo get in her car and drive off set after a boozing session.
According to Rodrick, Lohan was out of control, acting like an utter disaster and initially fired from The Canyons after blowing off two days of filming.
Rodrick says Lohan showed up outside the director's hotel room, pounding on the door, hysterically crying and begging for her job back - for 90 MINUTES.
Eventually, she was hired back ... but things only got worse.
Lohan began constantly criticizing producers and her co-stars, and got drunk before shooting a scene in which she would be simulating a four-way sex scene.
After the scene, which featured real-life porn stars, producers offered Lindsay a hired car to drive her home ... but she refused and drove off in her Porsche.
According to Rodrick, whose report was publicized by TMZ this afternoon, producers "all hoped they would still have a lead actress in the morning."
In the article, Rodrick says Lindsay Lohan freaked about another sex scene in which she was supposed to get naked ... and locked herself in a closet.
Rodrick says the director had to beg her to do the scene and even stripped naked himself and had the crew do the same to show her it was no big deal.
The gimmick worked, and Lohan filmed the 14-minute sex scene.
Unfortunately, the hits just kept on coming, however. Lindsay partied with Lady Gaga one night until 5:30 a.m., when she had a 6:00 a.m. call time.
She showed up at 9 a.m., but left soon after a doctor said she was too sick to film. Somehow, the film got made ... and looks like the worst movie ever: