Robert Cosby Jr’s sudden death at the age of 23 on February 23, 2026, has left his friends and family with unanswered questions. He was the son of The Real Housewives of Salt Lake City star, Mary Cosby, who had just been released from jail. His mother, Mary, confirmed the heartbreaking news in a statement to TMZ and shared that her son would finally be at peace now. As tributes continue to pour in for the 23-year-old’s death, fans have also turned their attention to his last Instagram post shared days before his death.
Robert Cosby Jr announced his return in his final Instagram post
A few weeks before his death, Robert Cosby Jr had returned to Instagram with what eventually became his final Instagram post. He posted on Instagram on February 6, 2026, sharing a series of photos of himself posing with a dog. Robert Jr seemed to stand outside what appeared to be the family’s home in Salt Lake City, Utah. He was dressed casually and smiled softly. Sharing the post with a short yet meaningful caption, he penned:
“I’m back :).”