Washington, Apr 5 : Former Holly wood actor Heath Ledger's family is finding it difficult to grasp with his loss, particularly on April 5, the star's 29th birthday.

In Australia, the Ledger family kept a low profile, and no notices appeared in local papers in memory of the actor.

"It's just a day-by-day thing. That's all a private family matter. It's got nothing to do with anyone else," People quoted a family source, as saying when asked how the Ledgers would be remembering the actor on his birthday.

Ledger's Brokeback Mountain co-star Kate Mara, who played his older daughter, said that playing opposite the actor was an honour.

"It was an honour to work with him, and I think that he'll always be in people's thoughts," Mara said.

"I think he affected people that he'd never met before," she added.

ANI