Naomi Watts too upset to talk about Heath Ledger's death

Grieving Naomi Watts was too upset to talk about the death of ex-boyfriend Heath Ledger on Saturday as she went shopping with her baby son.

The 'King Kong' actress, who was out with six-month-old Alexander in Santa Monica, California, told photographers: "I really don't want to talk to you guys right now."

Naomi and Heath were together for close to two years after meeting on the set of movie 'Ned Kelly' in 2002.

They reportedly split after Naomi - who is 10 years Heath's senior - had enough of his hard partying. But the pair remained close friends even after their break-up.

Naomi canceled all her press at the Sundance Film Festival to mourn Heath, who was found dead from a suspected drug overdose at his New York apartment on Tuesday.

She had been set to promote her upcoming thriller 'Funny Games'.