Michelle Williams is horrified at plans for a movie based on the days leading up to Heath Ledger's death.
The My Week With Marilyn's former boyfriend - the father of her six-year-old daughter Matilda - died from an accidental overdose in 2008 and Michelle is said to be furious that the film based on his last days is being touted.
A source said: "Michelle was horrified to hear talk of plans for such a grim film. She hates the thought of re-opening old wounds and finds it distasteful that people are trying to make money off his legacy. She never thought the film would get the green light but it looks like her worst fears could come true."
Michelle and Heath met on the set of Brokeback Mountain in 2004 with Matilda born on October 2005 and friends say it is the young girl Michelle is most worried about.
The source added: "It's all about Matilda. She doesn't want their daughter to be constantly reminded of the circumstances surrounding his death for the rest of her life."
