Lisa Robin Kelly, an actress best known for her role in “That ’70s Show,” a situation comedy that aired on the Fox network from 1998 to 2006, died Aug. 14 at a Los Angeles addiction treatment facility that she had entered earlier in the week. She was 43.

Her manager, Craig Wyckoff, announced the death. No official cause of death was disclosed.

Ms. Kelly portrayed Laurie Forman, sister of Topher Grace’s lead character Eric, on the Fox series.

Unlike some of her co-stars, such as Grace, Ashton Kutcher and Laura Prepon, Ms. Kelly fell out of the spotlight after appearing on the sitcom until she started making headlines for personal troubles.

She was arrested in November along with husband, Robert Joseph Gilliam, in connection with a disturbance at their home in Mooresville, N.C.

Actress Lisa Robin Kelly, who played Laurie Forman in “That 70s Show,” died in her sleep August 14 in California. (Kevin Winter/Getty Images)

In June, she was arrested on suspicion of drunken driving after her car stalled in Burbank, Calif.

— From news services