Mary Martha Cosby is an American television personality best known for starring on Bravo’s reality series The Real Housewives of Salt Lake City.
She first joined the show when it premiered in 2020 and has been a recurring cast member across multiple seasons.
Beyond reality TV, Cosby has also been associated with leadership in her family’s Pentecostal church in Salt Lake City, at times drawing controversy and public attention for those roles as well.
Mary Cosby’s only child was her son Robert Cosby Jr., who was 23 years old.
He appeared on The Real Housewives of Salt Lake City with his mother and was open about his struggles with substance abuse and mental health.
In February 2026, he was found dead at the family home in Salt Lake City after police were called for an apparent overdose.
The Salt Lake City Police Department has described the incident as a possible overdose, and the exact cause of death is still under investigation.
Family and friends, including Cosby, have publicly mourned his loss, sharing that they are heartbroken and taking comfort in their faith.
Before his passing, Robert Cosby Jr. faced several legal and personal challenges.
In November 2025, he was arrested for violating a protective order related to a dispute with his ex-wife, which led to charges and a jail stay.
He ended up serving about two months in Salt Lake County Metro Jail and was released on February 3, 2026, being placed on probation and ordered to complete community service.
Throughout his young adult life, he had openly battled drug addiction, sharing on reality TV that his issues began as a teenager, and had previously pleaded guilty to a DUI in 2022.
Mary Cosby and her husband shared a deeply emotional statement saying their “hearts ache” but that they find comfort in their faith and in the belief that Robert Jr. is “finally at peace.”
They thanked supporters for their prayers and expressed profound grief at losing their only child.
Moreover, the Real Housewives of Salt Lake City cast and other Bravo personalities publicly offered condolences, love, and support for Mary during this difficult time.
Bravo even paused production on the next season of the show out of respect.
Executive producer Andy Cohen described the news as “devastatingly sad” and emphasized that it is “every parent’s worst nightmare.”
Likewise, viewers and fans have taken to social platforms to express heartbreak and sympathy.
Our heartfelt condolences go out to Mary Cosby and her family during this incredibly difficult time.
Rest In Peace, Beautiful Soul.
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