Mary Frann, who played Bob Newhart's wife on TV's "Newhart," died Wednesday at 55.

Ms. Frann died at her home. The cause of death wasn't immediately known.On "Newhart," which ran on CBS for eight years, she played Joanna Louden, who with her husband ran a bed-and-breakfast in New England.

She also starred in the ABC series "Kings Crossing" and in the Jackie Collins miniseries "Lucky Chances" on NBC, and played Amanda Peters for four years on NBC's "Days of Our Lives."

She appeared in the TV movies "Fatal Charm," "Single Women, Married Men," "Eight is Enough: A Family Reunion" and "The Hitchhiker."

Born in St. Louis, Ms. Frann studied drama at Northwestern University and worked as a weather reporter for the NBC station in St. Louis. She was also host of a morning show on the ABC station in Chicago for four years.