The director of Liam Nesson's film, Chloe, says the actor is "heroic" for returning to the set days after burying his wife, Natasha Richardson.

"He called me and said, 'You know, let's do it right away.' It was really emotional," Atom Egoyan tells ET Canada. "I think the only way he could have come back was right after because his family was all there to support his boys. ... Liam is heroic. He came back and finished."

Neeson, who has two sons, Micheal, 13, and Daniel, 12, with Richardson, left the Toronto set to fly to his wife's side after learning of her ski accident in Montreal last month. He returned to the Chloe set days after the March 22 burial, where he was still "in a state of shock," Egoyan says.

"I think he's trying to absorb [what's happened]," Egoyan says. "He's suddenly a single parent with absolutely no preparation for that. ... [But he] is surrounded by people that really love him. There is a lot of support."

Neeson also recently signed on to his first project since Richardson's death: a remake of Clash of the Titans, in which he'll play Zeus.