Actress Lisa Robin Kelly has passed away at the age of 43 after a battle with alcohol abuse. The That '70s Show star went into a fatal cardiac arrest on Wednesday (14Aug13) at a rehab facility in California. She had checked into the treatment centre on Monday (12Aug13), a day after her boyfriend had had her admitted to a hospital over concerns for her booze addiction. A spokesperson for Kelly tells TMZ.com, "She had been fighting demons for a while and finally lost her battle." Kelly had been struggling with alcohol problems for several years, and was just arrested for a suspected DUI in June (13). She was previously busted for the same charge in 2010, when she was fined and sentenced to 12 months of unsupervised probation following an incident in North Carolina. Last year (12), she was arrested again on a felony charge of corporal injury upon a spouse following a complaint filed by her ex-boyfriend, John Michas, and months later, she was slapped with allegations of assault against her husband, Robert Joseph Gilliam. She filed for divorce from Gilliam in July (13). Born in Connecticut, Kelly began her acting career in 1992 after landing her onscreen debut in an episode of Married... with Children. She went on to appear in shows like Murphy Brown, Charmed, The X-Files and Days of Our Lives, but will perhaps be best remembered for her role as Laurie, the promiscuous older sister of Topher Grace's character Eric Forman in That '70s Show. She was a series regular for three years, but abruptly left and show writers attempted to cover up her departure by suggesting her character had been accepted into a beauty school. Kelly made a brief return to the sitcom during the show's fifth season, before being replaced in 2003 by actress Christina Moore for the sixth.