A Marriage Experiment Beginning in Las Vegas — 《The Ultimatum: Marry or Move On》 Season 4
Six couples split up and enter trial marriages in Las Vegas before deciding whether to wed, separate, or choose a new relationship.
Series 《The Ultimatum: Marry or Move On》 Season 4
Hosts Nick Lachey · Vanessa Lachey
Distributor Netflix
Release 2026-07-15 (Episodes 1–8) · 2026-07-22 (Finale · Reunion)
Format 10 episodes total
Participating couples Hayley·Blake · Ashley·Killian · Casey·David · Monica·Luke · Jessica Grace·Edris · Alex·Jebin
Season 4 First Look
Season 4 of 《The Ultimatum: Marry or Move On》 is a reality series about six couples with differing views on marriage who test their relationships in Las Vegas. When one person wants marriage and the other is uncertain, they temporarily separate from their existing partner and experience a trial marriage with another participant.
This season features Hayley and Blake, Ashley and Killian, Casey and David, Monica and Luke, Jessica Grace and Edris, and Alex and Jebin. Nick and Vanessa Lachey return as hosts, guiding the couples as they decide whether to stay together, break up, or make a new choice.
The first release consists of Episodes 1–8, released on July 15. The finale, featuring the final decisions, and the reunion, which checks in on the relationships after filming, will be added on July 22, bringing the full season to 10 episodes.
The 1-minute-8-second first-look video condenses the tension of the experiment, in which the participants spend a month with new partners, and their first choices.