Rex Features
The actress starred in the 2003 remake of the iconic slasher, which revolved around a group of college students being killed in rural Texas.
Speaking to The Independent, she said: "[It was] probably one of the hardest experiences for me, emotionally and creatively.
"It was intense because I was at this high level of freak-out for about a month. It was just so not this world."
The 27-year-old went on to say that she found making new project Planet 51 - an animated comedy about aliens - a "relief" in comparison.
"[It] was just fun. I wanted to do it because it was speaking to my inner child. Yes, I want to be an alien. Yes, I want to be green!"
Planet 51 is in cinemas in the US and released in the UK next month.
