She admits she finds some parts of the movie "very uncomfortable" to watch and refuses to sign photographs or recreations of the original drawing.

The 38-year-old beauty told Yahoo! Movies: "I don't sign that [picture]. It feels very uncomfortable. Why would you do that? People ask me to sign that [picture] a lot.

"There's a photo of it as well that someone has lifted from a still of the film, and that photo gets passed around too. I'm like 'No! I didn't mean for it to be a photograph that I would end up seeing still 17 years later."

The actress, who has a four-month-old son, Bear, with her husband Ned Rocknroll and children Mia, 13, and Joe, 10, from previous relationships, added: "It's still haunting me. It's quite funny really."

The Divergent star recently admitted she often "vomits" before shooting challenging scenes.

She said: "I think you get really good at mind-fucking yourself, to be honest. Acting is bloody scary. I still have moments when I think, 'I can't do this - everybody thinks I'm absolutely shit.'

“There are scenes I absolutely dread - there was a scene in Labor Day; the whole courtroom sequence in The Reader. I often throw up, which I'm a bit embarrassed about. It's the adrenaline."