The Twilight actress told last year (11) how Hemsworth was left writhing in agony when she aimed a stage punch during filming but mistakenly caught him square on the jaw.
She admits she can now see the funny side of the incident but was convinced the crew would have to abandon the shoot because of Hemsworth’s injury.
Stewart tells U.K. talk show host Graham Norton, “He’s a huge sex symbol so he needed a bit of roughing up! It wasn’t too bad, I left a mark but he was able to keep working. I punched him right out of his close up.
“It’s funny now but when it happened I thought, ‘I have just ruined the movie and I love this thing and we are going to have to stop filming.'”