Updated: February 26, 2026
The recent tragic passing of Robert Cosby Jr., the only son of The Real Housewives of Salt Lake City star Mary Cosby, has brought renewed attention to his personal life—including his secret marriage and the woman who was once his partner. While the query often searches for “Robert Cosby Jr ex girlfriend,” the key figure in his romantic history is Alexiana Smokoff, who transitioned from girlfriend to wife and then to ex-wife amid a turbulent period. Their relationship unfolded publicly through the reality show and court records, marked by love, challenges, and heartbreak.
Robert Cosby Jr., born in 2002 to Mary Cosby and Robert Cosby Sr., appeared on RHOSLC discussing his struggles with addiction and family dynamics. His romantic life became a storyline when rumors of a secret marriage surfaced.
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Who Was Robert Cosby Jr.’s Partner? Meet Alexiana Smokoff
Alexiana Arian Smokoff became the central figure in Robert’s personal life. The couple reportedly dated and then eloped in a quiet courthouse wedding in Utah in August 2022, when Robert was around 20. This secret marriage was revealed during Season 4 of RHOSLC, surprising viewers and even Mary Cosby herself at first.
- Low-key beginnings: They kept the relationship private initially, away from the spotlight of the show.
- Public reveal: Robert opened up on camera about his commitment, though challenges soon emerged tied to his ongoing battles with substance abuse.
- Age and background: Alexiana, around the same age as Robert (early 20s during their marriage), stayed mostly out of the media beyond court mentions.
Their story captured attention because it blended young love with the pressures of reality TV fame and personal demons.
The Rise and Fall of Their Relationship
What started as a promising romance quickly faced strain. Robert’s addiction issues, which he discussed openly on RHOSLC, played a significant role in the relationship’s difficulties. By 2024 and 2025, legal troubles escalated, including arrests related to domestic matters and protective orders.
- Protective orders and violations: Court documents from 2025 showed incidents leading to charges of assault and violating orders to stay away from Alexiana.
- Divorce filing: In November 2025, Alexiana filed for divorce while Robert was dealing with jail time. The filing came amid his latest arrest for allegedly breaching a restraining order.
- Finalization: The divorce was finalized in early 2026, shortly before Robert’s passing, with reports of a permanent no-contact order in place.
These events highlighted how addiction and legal issues can unravel even committed relationships.
Key Details at a Glance
Here’s a quick overview of the main facts surrounding Robert Cosby Jr.’s relationship with Alexiana Smokoff:
| Aspect | Details |
|---|---|
| Partner’s Name | Alexiana Arian Smokoff |
| Relationship Start | Dating prior to 2022 |
| Marriage Date | Secret courthouse wedding in August 2022 (Utah) |
| Public Reveal | Season 4 of The Real Housewives of Salt Lake City |
| Divorce Filing | November 2025 (by Alexiana) |
| Divorce Finalization | Early 2026 |
| Key Challenges | Robert’s addiction struggles, multiple arrests, protective orders |
| Outcome | Marriage ended; Robert passed away on February 23, 2026, at age 23 |
This table summarizes the timeline and core elements that drew public interest.
Why Their Story Resonated with Fans
The relationship between Robert and Alexiana wasn’t just tabloid fodder—it mirrored real-life struggles many families face. On RHOSLC, viewers saw Mary’s emotional pleas for her son to get help, and the marriage added layers to the family’s narrative. While some criticized the public exposure, others appreciated the raw honesty about addiction’s impact on loved ones.
Sadly, Robert’s story ended tragically with his death on February 23, 2026, reportedly from a suspected overdose. Mary Cosby later shared a heartfelt message, finding comfort in her faith.
Conclusion: A Reminder of Life’s Fragility
Robert Cosby Jr.’s relationship with Alexiana Smokoff—starting as a young romance, turning into a secret marriage, and ending in divorce—remains a poignant chapter in his short life. It underscores how personal battles like addiction can affect relationships, families, and futures. As fans and the RHOSLC community mourn, the focus shifts to supporting those left behind and raising awareness about substance abuse.
Their story serves as a sobering reminder to cherish connections and seek help when needed. Rest in peace, Robert.