'That '70s Show' star Lisa Robin Kelly dead at 43

Lisa Robin Kelly, who rose to fame as Laurie Forman on "That '70s Show" died on Wednesday night, her manager told FOX411. She was 43.

The actress died in a rehab facility, and her cause of death is still unknown.

"Unfortunately Lisa Robin Kelly passed away last evening. Lisa had voluntarily checked herself into a treatment facility early this week where she was battling the addiction problems