We're learning more about this terrible tragedy.
Lisa Robin Kelly, best known for playing Topher Grace's older sister Laurie on That 70s Show, has died.
The troubled star struggled with drinking and drug addiction for years.
She was in rehab late Wednesday night when she reportedly went into cardiac arrest in her sleep. She could not be revived.
Lisa's agent broke the news, saying:
"She had been fighting demons for a while and finally lost her battle."
We're so sorry to see an actress with such potential fall before her time. So sad.
[Image via Fox.]