Heath Ledger to tie the knot

Aussie actor Heath Ledger is engaged to his girlfriend Michelle Williams, according to reports.

Dawson's Creek star Williams, who is also pregnant, was spotted sporting a diamond ring on her engagement finger at a recent film premiere.

The pair met on the set of Ledger's upcoming gay western Brokeback Mountain after he ended his two-year romance with fellow Aussie Naomi Watts.