Loni Anderson’s cause of death has been confirmed as a rare and aggressive form of uterine cancer that occurs in just 6 out of 1 million women in the U.S. each year.

American actress Loni Anderson's cause of death was recently revealed three weeks after she passed away. For those unfamiliar, Anderson died just two days before her 80th birthday on August 3, 2025, at a Los Angeles hospital following a "prolonged" illness.

Loni Anderson’s cause of death was confirmed as metastatic uterine leiomyosarcoma, a rare and aggressive form of cancer that starts in the uterus and often spreads to the lungs and liver. Anderson is survived by her husband Bob Flick, two children, and several grandchildren, and is remembered for both her television and film work.