Michelle Williams is putting her professional life on hold.
Filming on her next movie, Blue Valentine, has been postponed while she takes the time to grieve for Heath Ledger, her onetime fiancé and father of her child, the producers of the film confirmed Tuesday to E! News.
Production was due to begin Feb. 25 but has been pushed back indefinitely.
The film stars Williams and Ryan Gosling as a young couple struggling with their marriage.
Williams, 27, and her two-year-old daughter, Matilda, were in Los Angeles over the weekend, attending a private memorial for Ledger, who was found dead in his Manhattan apartment last week.
An initial autopsy on the 28-year-old actor was inconclusive and authorities are waiting for additional test results to determine the cause of death.
A private funeral service was expected to take place this week in Ledger's hometown of Perth, Australia, though no details were revealed.
Ledger's uncle, Mike Ledger, told Australian reporters that the actor's grammar school had offered the use of its chapel, but that his parents, Kim Ledger and Sally Ledger Bell, had not yet finalized their plans.
"Kim will be bringing Heath home, but in terms of memorial services, it's up to Kim and Sally,'' Mike Ledger said in an interview.
"We know the chapel at Guildford is available if Kim wants it. But they may even keep it very private. We may not even go to the funeral ourselves."
Before his death, Ledger had recently wrapped production on what may be his final role—the Joker in this summer's Batman sequel, The Dark Knight.
Director Christopher Nolan shared some of his experiences working with the actor with Newsweek, recalling that Ledger was "bursting with creativity."
"He once told me that he liked to wait between jobs until he was creatively hungry. Until he needed it again. He brought that attitude to our set every day," Nolan wrote.
"There aren't many actors who can make you feel ashamed of how often you complain about doing the best job in the world. Heath was one of them."
Meanwhile, production on The Imaginarium of Doctor Parnassus, the Terry Gilliam fantasy Ledger was working on at the time of his death, has been suspended while the director and producers determine how best to proceed.
According to a report in Variety last week, the film has three options: recast, shoot around Ledger's absence or shelve the project entirely.
Christopher Plummer, who costars in the film, told People that Gilliam is desperately trying to find a means of saving the project.
"Terry's throwing himself into the job of trying to salvage the picture," Plummer said.
"Fortunately, because the film deals with magic, there is a way, perhaps, of turning Heath into other people and then, using stills and I think they call it CGI..."
"[Gilliam] very wants to go on with the movie, and I can very much understand why. Because he wants to dedicate it to Heath, of course."