The Young Adult star confessed that she was teased by her schoolmates when she was younger, saying that she never really fit in.
"I actually got a lot of the mean girl stuff from the ages of 7 to 12. I was pretty much a mess in primary school," Theron told People. "But I got that out of my system by the time I got to high school and was more immune to all of that stuff."
The actress went on to say that she was obsessed with fitting in.
"I wasn't in the popular crowd. There was a really popular girl at school and I was obsessed with her. I mean you would go to jail for that stuff today," Theron continued.
"I was in tears one day because I couldn't sit next to her," she finished.
Theron recently admitted that she feels like a child on the set of Snow White and the Huntsman, describing the shoot as "very fun".
She previously insisted marriage is not important to her, saying that she has no plans to wed in the near future.
Watch the trailer for Snow White and the Huntsman below: