Kris Jenner’s mother, Mary Jo Campbell — affectionately known as MJ — has passed away at the age of 91, with her death officially attributed to acute cardiopulmonary arrest, according to her death certificate.

A copy of the certificate, obtained by Us Weekly, reveals that acute respiratory failure and metastatic lung cancer were also contributing factors in her passing. The document indicates that MJ had been quietly battling lung cancer for several months before her death, though the exact timing of her diagnosis has not been made public.

Mary Jo Campbell was no stranger to health battles. In the past, she had successfully overcome both breast cancer and colon cancer. However, her treatments were not without lasting effects. During an episode of Keeping Up With the Kardashians, Kim Kardashian shared that MJ had suffered intestinal damage as a result of radiation therapy — a complication that impacted her health in the years that followed.

According to official records, MJ passed away on July 16 at a hospital in Los Angeles. She was later cremated on July 23. The certificate also confirms that no autopsy was performed.

Kris Jenner first shared the heartbreaking news with the public through a deeply emotional tribute on Instagram, honoring her mother’s life, strength, and unwavering love for her family.

To celebrate MJ’s life, the Kardashian-Jenner family आयोजित a three-hour “celebration of life” event at the La Valencia Hotel in San Diego. The gathering took place on what would have been her 92nd birthday, bringing together family and close friends to remember and honor a woman who played a central role in their lives.

Mary Jo Campbell’s passing marks a profound loss for the Kardashian-Jenner family. Known to fans through occasional appearances on the family’s reality shows, MJ was admired for her warmth, resilience, and enduring spirit. Her legacy lives on through her family and the countless memories she leaves behind.

Sources: https://www.tmz.com/2026/07/28/mary-jo-campbell-cause-of-death/