A Beverly Hills judge has issued a warrant for the arrest of Lindsay Lohan, the 24-year-old actress who was reported last week to have failed a drug test.
Lohan has been ordered to appear Friday morning before Los Angeles County Superior Court Judge Elden Fox, ABC News was told. She will not be taken into custody before then, though she could face additional jail time -- 30 days or more -- for flunking the court-ordered test.
TMZ.com said she tested positive for cocaine. Lohan, who has struggled with drug and alcohol problems, admitted on Twitter Friday that she had flunked a random test, but has said she was working hard to stay clean.
Lohan left a rehab program at UCLA Medical Center on Aug. 24 after 23 days of treatment. Earlier in August, she was released from jail after serving just 13 days of a 90 day sentence for violating her probation stemming from a 2007 DUI case.
At a hearing last month, Judge Fox ordered Lohan to go to weekly psychotherapy and behavioral therapy sessions, in addition to 12-step dependency program meetings and mandatory drug tests. Fox said if Lohan was found to be in violation of the terms of her probation, she could go to jail again for 30 days.
The failed drug test reports are the latest to plague Lohan. Last month, a papparzzo claimed he saw her hit a baby's stroller with her Maserati and drive away. No charges were filed relating to the alleged incident.
Even before she hit the bottom of the barrel, Lindsay Lohan was apparently plotting a way to crawl back to the top.
In an interview with Vanity Fair magazine, done prior to her latest jail and rehab stint, Lohan said she wants A-list status in Hollywood again, by any means necessary.
"I want my career back," she said. "I want the respect that I had when I was doing great movies. And if that takes not going out to a club at night, then so be it. It's not fun anyway.
"I don't care what anyone says. I know that I'm a damn good actress," she continued. "And I know that in my past I was young and irresponsible, but that's what growing up is. You learn from your mistakes."
Lohan appeared on Vanity Fair's cover and in the magazine, lounging on the beach, evoking old Hollywood glamour. Her problems, however, are firmly in the camp of today's tabloid-prone celebrities.
A probation report released in July revealed that Lohan has prescriptions for the antidepressants Zoloft and Trazodone; Adderall, a stimulant used to control attention-deficit hyperactivity disorder; the acid reflux medicine Nexium and the powerful painkiller Dilaudid.
"I've never abused prescription drugs," Lohan said.
"I never have, never in my life," she continued. "I have no desire to. That's not who I am. I've admitted to the things that I've done -- to, you know, dabbling in certain things and trying things 'cause I was young and curious and thought it was like, OK, 'cause other people were doing it and other people put it in front of me. And I see what happened in my life because of it."
Lohan also insisted that despite multiple DUI arrests and rehab stays, she's not an alcoholic.