Facing jail again: Lindsay Lohan, pictured today at the Match Box Studios in Culver City, California, could face 30 days in jail after reportedly failing a drugs testFurther claims actress failed a second drugs test
Estranged father speaks out, saying she needs him in her life
Lindsay denies allegations, branding reports 'nuts'
Lindsay Lohan is facing a return to jail after reportedly testing positive for cocaine.
The 24-year-old actress has failed a court-ordered drugs test, according to celebrity website TMZ, following her August 2 release from jail.
The website claims that the star, who served 13 days in jail followed by 23 days in rehab last month for a probation violation, returned a positive drugs test last week.
It further alleges that she failed another drugs test around the same time. This one, TMZ claims, did not test positive for cocaine, although no further details were given.
However the website claims to have confirmed the positive result through its own sources.
In recent weeks, the troubled starlet has appeared to return to her old pastimes - after reportedly partying all night earlier in the week at New York's Boom Boom Room.
According to the current terms of her probation, failing a drugs test would result in a term of 30 days in jail.
However Lohan has denied the reports telling the US Weekly website: 'I'm fine' branding the allegations 'nuts'.
A spokesperson for the district attorney's office told TMZ that they have not been 'officially notified' of the positive test and therefore no court date has been set.
Mugshot: The police photo of Lindsay in her regulation orange jumpsuit in JulyThe troubled starlet has since returned to Los Angeles where she has been spotted shopping up a storm and lunching with friends.
Lohan was spotted yesterday leaving Beverly Hills eatery Phillipe Chow after a long lunch with her friend, British socialite Lady Victoria Hervey.
And today she was pictured at the Match Box Studios in Culver City, California.
Her estranged father Michael has spoken out about the claims, telling Radar Online that she needs him back in her life.
Putting the blame squarely on the circle of people around her, he said: ' Her manager and her friends failed, they failed beyond belief [and] I will do all that I have to call them out.
'I’m sorry, I’m really sorry. I wish she would just listen to me and just let me into your life. I’m telling you if you had me in your life this never would happen.'
This latest twist in the Lohan saga comes after the actress made a cameo appearance alongside Chelsea Handler at Sunday's MTV Video Music Awards.
In the pre-taped skit she poked fun at herself and her recent brushes with the law.
In the skit, Lindsay catches up with Chelsea, 35, backstage at the MTV Video Music Awards and lectures her on the perils of alcoholism.
At one point Lindsay slaps Chelsea on the face, yelling 'Wake up, Handler! Pull it together, you're a mess!
'Do you think anyone wants to work with a drunk? Take it from me they don't!'
Meantime all the major chat shows have been scrambling to secure a much coveted first post rehab interview with Lohan.
It was rumoured that Oprah had secured a sit down tell-all to air during her final season of her hit daytime show, but no official announcement has been made.
Crime and punishment: The Lynwood Correction Facility in California where Lindsay served 13 days of a 90-days sentence six weeks ago 
Lindsay seen, left, appearing in court earlier this year where she was sentenced to a jail term for probation violations stemming from a 2007 DUI chargesource: dailymail
