Supermodel Kate Moss will not be charged over claims she took cocaine, the Crown Prosecution Service has said.
The pictures of Kate Moss were published last year
Pictures of Moss, 31, allegedly taking cocaine at a London recording studio last September appeared in a newspaper.
The CPS said the film footage "provides an absolutely clear indication that Ms Moss was using controlled drugs and providing them to others".
But the "precise nature" of the drug could not be established and there was "insufficient evidence" to prosecute.
Ms Moss lost modelling contracts and checked into a rehabilitation clinic after pictures of her allegedly taking cocaine were published in the Daily Mirror last year.
The CPS said the Metropolitan Police had investigated the allegations involving events at a recording studio in Chiswick High Road, on the night of the 5/6 September.
The CPS said there was insufficient evidence for a realistic prospect of conviction against the model.
CPS London's director of serious casework, Rene Barclay, said it had been a "protracted investigation" because crucial evidence was obtained through a court order and because of "the absence of Ms Moss from the UK for several months".
Mr Barclay continued: "Expert analysis of the footage, however, narrowed the possibilities down to three particular drugs - cocaine, ecstasy or amphetamine.
"But these three substances fall into two different legal categories of controlled drugs.
"To obtain a conviction, case law establishes that the prosecution must prove beyond reasonable doubt, the legal category to which the substance being used belonged."
After the pictures emerged, Ms Moss apologised through her modelling agency Storm and said she took "full responsibility" for her actions.
"I also accept that there are various personal issues that I need to address and have started taking the difficult, yet necessary, steps to resolve them," she said.
Metropolitan Police Commissioner Sir Ian Blair, who has pledged to tackle middle-class users of cocaine, had said the decision on whether to charge Moss would take into account her effect on "impressionable young people".