A Los Angeles judge revoked the actress' probation Wednesday and scheduled a hearing to determine whether she should go to jail.
TMZ said Lohan, 26, could spend as many as 245 days behind bars for allegedly violating her probation in a necklace-theft case by lying to police and driving recklessly when she crashed her Porsche into a truck last June.
The hearing is scheduled for Jan. 15.
Lohan is a former child star whose once-bright career in films such as "The Parent Trap" and "Mean Girls" has been eclipsed in recent years by her legal woes and battles with drug and alcohol addiction.
She was most recently seen in the critically panned TV movie "Liz & Dick."