Actress Lisa Robin Kelly, who had a role in the US sitcom That `70s Show alongside Ashton Kutcher and Mila Kunis, has died at age 43.

Her manager Craig Wyckoff said Kelly died on Wednesday at a Los Angeles addiction treatment facility where she had been admitted earlier in the week.

No official cause of death was given.

Kelly portrayed Laurie Forman, the promiscuous sister of Eric - played by Topher Grace on the Fox series, which ran from 1998 until 2006.

She left the series at the end of the fifth season in 2003. Her character was portrayed by the actress, Christina Moore, in season six.

Kelly fell out of the spotlight after leaving the show but soon began making headlines for her troubled personal life.

She was arrested in November along with her 61-year-old husband, Robert Joseph Gilliam, in connection with a disturbance at their home in North Carolina.

In June, she was arrested on suspicion of drink driving in California.

"Lisa had voluntarily checked herself into a treatment facility early this week where she was battling the addiction problems that have plagued her these past few years," said Wyckoff.