"I gained 70-ish pounds over two years," Pieterse recounted. "It was really, really hurtful the way people reacted. They were saying stuff like, 'She's pregnant.' 'You're fat.' They were angry, they were mad that I look like this. It was one of the hardest things I've ever been through."
The 21-year-old actress said she had no idea why she suddenly started putting on weight, and had no idea how to deal with her problem until just recently, when she was diagnosed with Polycystic Ovary Syndrome, a hormone imbalance.
"Finally, I knew what this was happening to me," she shared.