Oprah Where Are They Now:
When Alison Arngrim was 12 years old, she landed the role of Nellie Oleson on Little House on the Prairie. Alison's villainous character was known for her brazen attitude and fearlessness, but in her personal life, Alison says, she was hiding a secret from her loved ones and castmates. Watch as Alison opens up about the sexual abuse she suffered as a child.
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