Nicole Kidman has admitted she found her new movie "devastating" to film.
The Moulin Rouge actress took to the red carpet at the Toronto International Film Festival with hubby Keith Urban on her arm for the premiere of Rabbit Hole, which sees a couple try to cope with the death of their four-year-old child.
Nicole - who has a two-year-old daughter with Keith - said: "Most films are hard if they're beautifully written and they're dealing with a subject matter that isn't easy, that isn't a comedy - devastating. But at the same time I wanted to do it justice for the people that have been through this."
She added: "I wanted to honour them so I felt if someone can actually go through this, then I can do it as an actress.
"It's not easy to get a film like this made, or get it screened in Toronto, I just feel very grateful and very emotional."
Co-star Aaron Eckhart agreed that filming the movie was intense at times, but he tried to lighten the mood on set.
He said: "At times it was (serious on set), at appropriate times. But at other times, because Nicole really kept a good set, (it was a) very friendly, very quiet set which was good.
"Everybody felt like they could say what they needed to say, joke around. I probably joked around a little bit more that Nicole did, but I felt like that was appropriate, I wouldn't have done it if it wasn't appropriate."
And Nicole returned Aaron's praise, saying: "He's such an inspiration, I loved being able to explore this together. He was right there through the whole thing supporting me and I hope I was supporting him and he felt that."