Actor Heath Ledger's abuse of heroin, cocaine and pills forced his ex-fiancee Michelle Williams to send him to rehab in 2006, Us Weekly reported Thursday.

A Ledger confidant was quoted as saying Williams had been a firsthand witness to the Brokeback Mountain actor's use of alcohol and drugs for three years. It included cocaine, heroin and "a variety of pills."

Williams drove Ledger to Promises Treatment Center in Malibu, Calif. in March 2006.

Actor Heath Ledger and his ex-fiancee Michelle Williams. (file photo: Xinhua)

Ledger refused to check in, pledging to clean up, the source said.

After the couple split in September 2007, two sources told Us Weekly that Williams asked Ledger to be drug-tested before he visited their daughter Matilda.

When news of Ledger's death broke last week, Williams was inconsolable, another source said.

"She cried and screamed as soon as she heard."

Williams' movie, Blue Valentine, has been postponed until further notice. She was too distraught to return to work.

Actor Heath Ledger and his ex-fiancee Michelle Williams.

A Paramount spokeswoman said that Williams' other film, Shutter Island, co-starring Leonardo DiCaprio, was still scheduled to begin shooting March 6.

Ledger was found him dead last week in his apartment.　

An autopsy on the 28-year-old actor was inconclusive and the cause of his death will not be known for at least a week. Authorities suspect a possible drug overdose.

(Agencies via Xinhua February 1, 2008)