Lindsay Lohan could be sentenced to 30 days in jail over her failed drug test.
According to a source, the troubled starlet, released early from rehab last month, failed the court-mandated test last week.
The terms of her probation call for her to get 30 days in jail on each of three counts. Prosecutors declined to comment.
She was ordered into rehab for another 90 days, but let go after 23 days with a stern warning to stay out of trouble.
"It appears she is very serious about her sobriety," the New York Daily News quoted Judge Elden Fox as saying.
"She is very serious," Lohan's lawyer Shawn Chapman Holley told the court.
"She has learned her lesson and wants to move on in a positive way," Holley added.