Lisa Robin Kelly. Photo / AP

That 70s Show actress Lisa Robin Kelly has died in her sleep at a rehab centre, reports say. She was 43.

Kelly played Eric Foreman's older sister Laurie on the long-running TV comedy.

She had voluntarily checked herself into a rehab centre to receive treatment for alcoholism last week, TMZ reports.

Her agent told the gossip site she had been "battling demons for a while and finally lost her battle".

Kelly had been arrested four times in recent years for drunk driving, spousal abuse and assault.

- Herald Online