Here's what Natalie Portman had to say about why she wasn't available for this scene.
"It was for reshoots (after the film was finished) and he was working in Hong Kong and I couldn't get there because I was working on my own film. And so they put his wife in my wig and costume, that's why it was so passionate. It was such a perfect solution, wasn't it?"
Elsa Pataky, whose credits include Fast Five, Fast & Furious 6 and Giallo, has been married to Chris Hemsworth since 2010. She was with her husband on the reshoots with their first child, India, when she was asked to step in for Natalie Portman.