While Heath Ledger’s final film has been the center of entertainment buzz and now breaking box office records, Michelle Williams is laying low. Since Heath’s death six months ago, Michelle has been spending a lot of time with Heath’s Australian BFF Trevor Di Carlo.

According to a source, the pair have been seen eating out together and taking strolls around Brooklyn, with Di Carlo, 29, wheeling two-year-old Matilda, the daughter of Ledger and Williams, in her pushchair.

Di Carlo’s mother Dianne has been reported in Australian newspapers as saying: ‘Michelle and he are the best of friends. It is a very special time for him to be with Matilda.’

Di Carlo and Heath knew each other ever since they were both three-year-olds in Perth in Western Australia.

The Dark Knight has so far earned $66.4M in North American gross from a record-setting wide release of 4,366 theaters. That includes the record-setting $18.5M in midnight-to-3AM shows from a smaller pool of 3,040 venues. It is right on track for selling a whopping $150 million for the opening weekend.

Wowsers. Let’s hope Matilda gets some of that money Heath is earning from this film!