UPDATE 4:00pm ET: According to TMZ, It was Murphy's mother who discovered her unconscious in the shower. When paramedics arrived just after 8 a.m., they immediately began administering CPR and rushed her to nearby Cedars-Sinai Medical Center, where she was pronounced dead.
UPDATE 10:00pm ET: A Los Angeles County coroner's official says it appears actress Brittany Murphy died of natural causes.
UPDATE MONDAY EVENING: Coroner 'defers' cause of death
UPDATE TUESDAY MORNING: Coroner's notes reveal Murphy's last moments; Murphy was scheduled to shoot Happy Feet sequel in 2010
UPDATE TUESDAY AFTERNOON: Producers were warned about Murphy's Husband