Heath Ledger is keeping quiet over the rumours that suggest he has married his fiancée.

Tabloid rumours that the actor and his Brokeback Mountain colleague Michelle Williams have tied the knot have started to spread this week, and Ledger himself is not technically denying it.

However, he refuses to give anything at all away, and is letting the press draw its own conclusions.

"We try not to talk about it, to keep it our own kind of thing," he told Newsweek magazine. "It's obviously very sacred. People write stories regardless. The stories haven't necessarily been bad. So we're letting people run with their assumptions."