Heath Ledger's ex-lover Michelle Williams left 'devastated' by death

Heath Ledger's ex-lover Michelle Williams was left 'devastated' by news of the star's death, according to U.S reports.

Williams, who has a two-year-old daughter Matilda with Ledger, was on location in Sweden when news of his death broke.

She is now reportedly making her way back to the U.S with her daughter, People magazine reports. "She's devastated," a source close to 27-year-old Williams said.

The couple was together for three years, after meeting on the set of Brokeback Mountain, in which she played the wife of Ledger's gay cowboy character.

The couple were often rumoured to be on the verge of tying the knot, but eventually split last September.

"I can't believe Matilda is going to grow up without a dad, without knowing her father," another source told People. "And that Michelle will have to deal with having a daughter who's lost her father.

"She's a survivor. She'll make it, but it's going to be hard. Her first concern is going to be Matilda."