AceShowbiz -

Rumor has it that Heath Ledger and fiancee Michelle Williams are facing serious problems which may result in their split.

Australian magazine, NW, brings the report to the surface, claiming Heath has postponed his wedding to Michelle indefinitely, sparking rumors the pair are experiencing serious problems in their relationship.

On that encounter, it is reported that Heath has become so moody and depressed since he started filming the new Batman film "The Dark Knight", in which he portrays The Joker. "Michelle thinks Heath's just under too much pressure and taking the role too much to heart," says a source. "She's been trying to urge him to take a few months off from filming, but he refuses."

Will both of them split or make it to walk down the aisle? Time will tell then.