Samantha Morton has revealed that her daughter has given her the thumbs up for her John Carter performance.

The Oscar-nominated actress - who has starred in Woody Allen's Sweet And Lowdown, Elizabeth: The Golden Age and Minority Report - is barely visible in her portrayal of alien Sola in Andrew Stanton's epic sci-fi fantasy, alongside Willem Dafoe and Taylor Kitsch.

She said her daughter Esme loved the performance.

"She loves it. She thought it was amazing. But I don't think she liked it when Sola was in trouble," she said.

Samantha, who also has a four-year-old daughter Edie, said her children don't influence the type of roles she takes.

"It's a bonus that Esme can go and watch it now, because she's 12, but that shouldn't be a motivation for working," she explained.

"I did that once with a film and it backfired on me. I was offered a film and I said, 'I don't know if I can do that at the moment', but then I thought it would be nice for Esme. You shouldn't do things for that reason."

The actress had to learn to walk on three-feet stilts and wear motion-capture cameras for her role.

"It was physically demanding. We had a few weeks of training before we went into production for sword-fighting, being able to defend ourselves and learning how to walk, sit and breathe - and learning to act with cameras on our heads too. It was a great character study," she recalled.

:: John Carter is in cinemas now.