Private Memorial for Heath Ledger - Guest included Tom Cruise, Ben Harper...

A host of A-list stars yesterday held a private memorial service for actor Heath Ledger, whose mysterious death nearly two weeks ago shocked Hollywood.

Led by megastar Tom Cruise, his wife Katie Holmes, Sienna Miller and Ellen DeGeneres, the stars paid tribute to the 28-year-old Oscar nominee on the lot of Sony studios in Los Angeles, celebrity magazine People said.

Director Todd Haynes, who directed Ledger in I'm Not There, spoke at the ceremony and singer Ben Harper performed.

Ledger's ex, actress Michelle Williams was not at the memorial service but realeased a statement on Saturday saying "My heart is broken".

In her first statement since the death of her former companion Ledger, Williams asked for privacy for her and daughter Matilda.

"Please respect our need to grieve privately," Williams said in a statement released by Ledger's spokeswoman. "My heart is broken."

Williams, 27, and Ledger, an Australian actor, met on the set of the 2005 movie "Brokeback Mountain," fell in love and had Matilda, who is now 2 years old. They split up in September. "I am the mother of the most tender-hearted, high-spirited, beautiful little girl who is the spitting image of her father," Williams said in her statement.

"All that I can cling to is his presence inside her that reveals itself every day. His family and I watch Matilda as she whispers to trees, hugs animals, and takes steps two at a time and we know that he is with us still. She will be brought up with the best memories of him."

Ledger, 28, and Williams lived together in New York and there was speculation they planned to marry, although they never officially confirmed an engagement.

Ledger was found dead in his bed on January 22 in his New York apartment with sleeping pills and prescription drugs nearby, police said. The cause of death has yet to be determined but an official with the New York Medical Examiner's office said autopsy results were due Tuesday or Wednesday at the earliest.

The actor's body has been flown home to Australia where his family is arranging a private funeral and memorial.

Ledger's spokeswoman told Reuters that if a public service is held, the family would share those arrangements. Williams' whereabouts were not disclosed.

In recent days, several celebrity magazines have cited unnamed sources as saying Ledger was using drugs including cocaine, and his party lifestyle caused the breakup with Williams but none of those reports could be confirmed.