©Warner Bros. Pictures / 'Gravity'

WENN

Sandra Bullock fought to play the mother of a dead child in “Gravity” even though she knew the role would be tough because she’s a happy mom in real life.

The actress portrays a desperate doctor lost in space in the hit sci-fi movie and when director Alfonso Cuaron was creating the character she urged him to consider giving her a sad life on earth back story.

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Bullock tells Entertainment Weekly she knew it was important to give her character no one to come back to.

She explains, “I said I didn’t want her going back to a child, because of course someone’s going to fight for that. So what if she had absolutely nothing to fight for — she’s lost a child, there’s nothing back home, she’s a person who’s basically a machine?

“That was my idea, and Alfonso was open to it. It was the worst possible headspace to be in … but at the end of the day, I went out into the sunshine, out to where the life force was — my son.”