RHOSLC's Mary Cosby Shares Heartbreaking Tribute After Son's Death

The reality star mourns the loss of her 23-year-old son Robert Cosby Jr. just days after his passing.

Mar. 3, 2026 at 5:55am

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Mary Cosby, star of The Real Housewives of Salt Lake City, shared a heartbreaking tribute to her late son Robert Cosby Jr. on Instagram just days after his death on February 23, 2026. Robert Jr. was 23 years old. The cause of his death is still under investigation by the medical examiner, but police responded to a possible overdose. In her post, Cosby shared a sweet photo of herself and her son along with the caption "#godfirst #love #forever. I'm Going to miss you bubs."

Why it matters

Robert Cosby Jr.'s death is a tragic loss for Mary Cosby and her family. As a cast member of the popular Bravo reality series, Cosby's personal life and her son's struggles with addiction have been chronicled on the show. His untimely passing at just 23 years old is sure to deeply impact Cosby and the RHOSLC community.

The details

According to reports, police responded to a possible overdose on February 23, 2026 and found Robert Cosby Jr. deceased. The medical examiner is still investigating the cause of death. Just two days prior, Cosby had confirmed her son's passing in a statement, saying "Our beloved son Robert Jr. has been called home to the Lord. Though our hearts ache, we take comfort in God's promise and in knowing he is finally at peace." Robert Jr. had a history of legal and addiction troubles that were featured on The Real Housewives of Salt Lake City.

  • Robert Cosby Jr. died on February 23, 2026.
  • Mary Cosby shared a tribute to her son on Instagram on February 28, 2026.

The players

Mary Cosby

The star of The Real Housewives of Salt Lake City and the mother of the late Robert Cosby Jr.

Robert Cosby Jr.

Mary Cosby's 23-year-old son who passed away in February 2026.

Robert Cosby Sr.

The father of Robert Cosby Jr. and Mary Cosby's husband.

Andy Cohen

The host of the Real Housewives reunion shows and Bravo executive who expressed condolences over Robert Cosby Jr.'s death.

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What they’re saying

“Devastatingly sad news out of SLC. This is every parent's worst nightmare. My heart is broken for Mary, and I am sending all my love to her and Robert Sr.”

— Andy Cohen

“Our beloved son Robert Jr. has been called home to the Lord. Though our hearts ache, we take comfort in God's promise and in knowing he is finally at peace. We are grateful for your prayers and trust in the Lord to carry us through this time of sorrow.”

— Mary Cosby

The takeaway

The tragic loss of Mary Cosby's son Robert at just 23 years old is a heartbreaking reminder of the devastating impact of addiction and the fragility of life. As a public figure, Cosby's grief will be shared by her many fans, who have followed her family's struggles on the reality show. This loss will undoubtedly shape the next season of The Real Housewives of Salt Lake City as Cosby and her loved ones work through their grief.