Last year the public saw another side of actress Reese Witherspoon, when a video emerged online showing the Oscar winner arguing with a police officer while her husband was being arrested for driving under the influence. Over a year later, Witherspoon has opened up about the incident while promoting her new movie Wild, where she plays a woman who embarks on a remarkable journey of self-discovery.

Reese WitherspoonWitherspoon at the BFI screening of Wild

Speaking about her 2013 arrest Witherspoon said, "I think it was a moment where people realised that I wasn't exactly what they thought I was. I guess maybe we all like to define people by the way the media presents them, and I think that I showed I have a complexity that people didn't know about. It's part of human nature," the actress said.

Adding, “I made a mistake. We all make mistakes. The best you can do is say sorry and learn from it and move on.” After her arrest, the actress pleaded no contest and was fined $213, while her husband Jim Toth pleaded guilty to driving under the influence and was sentenced to 40 hours of community service and one year of probation.

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Witherspoon was appearing at the BFI London Film Festival to promote her new movie Wild which sees her starring as Cheryl Strayed. The script was adapted by Nick Hornby from Strayed’s autobiography Wild: From Lost to Found on the Pacific Crest Trail, which chronicled the 1,100-mile hike she undertook with no prior backpacking experience.

Speaking about the challenges of the role Witherspoon revealed that when it came to some of the problems of camping, often there was no acting was involved, "When you see me putting together the tent, that's literally me putting together the tent. It took me two hours. I could not figure out the f—ing tent," she said. "And when I kicked the stove, it's because I couldn't make the f—ing stove work.”

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Witherspoon also revealed that directorJean-Marc Vallee made her carry a heavy rucksack through filming, instead of one filled with newspapers  she had requested, "I got there on the day, and Jean-Marc said, 'Actually, I think it would be better.' And I said: 'Are you joking?' And he said, 'No, I think it would be better' and then just walked off. So I ended up carrying it the whole time. I've never been as strong as I was after that movie. I had a back problem."

Wild is scheduled for release on December 5th.

Reese WitherspoonWitherspoon and Cheryl Strayed