Speaking to Digital Spy at the London Film Festival premiere of the adaptation, the One Hour Photo filmmaker admitted that he was also attracted to the originality of Ishiguro's text.
"I'm a huge fan of Kazuo's books and I was very moved by it," he said. "I also felt that it had an extremely original tone that might result in a film that would be a new experience for audiences. That's the perfect combination."
Of the story, which centres on children who will only live a short life and has science fiction elements, Romanek added: "I think science fiction really creates a metaphor to deal with the bigger themes that the film's about. If people come expecting to see a science fiction film I think they might be disappointed, it's a much more emotional, love story experience."
Never Let Me Go, starring Carey Mulligan, Andrew Garfield and Keira Knightley, is currently screening at the London Film Festival and will open in UK cinemas next year.
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