Naomi Watts broke down following an emotional tribute to Heath Ledger at a short film festival in Australia on Sunday.

The 21 Grams star, who was a judge at the annual Tropfest event in Sydney, began crying when a video montage honouring the late actor's career was shown.

Watts dated Ledger for two years after meeting him on the set of Ned Kelly in 2002.


Heartbroken - Naomi Watts poses alongside John Polson at the Sony 'Tropfest,' film festival in Sydney, Australia.

The Brokeback Mountain star was found dead in his New York apartment last month. A New York medical examiner has since confirmed that the 28-year-old was killed by an accidental overdose of prescribed medications.