E! highlights Josh Groban's custom Brilliant Earth engagement ring details

Josh Groban and Natalie McQueen’s engagement landed with a ring detail worth pausing on: a custom Brilliant Earth design built around a 4.04-carat radiant diamond, set in platinum and framed by marquise diamonds that wrap above and beneath the center stone. E! Online folded the couple into its 2026 celebrity engagements gallery after the pair shared the news publicly on social media, but the jewelry is what gives the moment staying power.

The ring reads as more than a large center stone. The radiant cut brings a rectangular shape with softened, curved tips, which gives the diamond a cleaner, more architectural outline than a traditional round. That shape has become a useful reference point for shoppers who want presence without going fully into cushion or oval territory. In this setting, the radiant cut is doing the heavy lifting, while the platinum mount keeps the look crisp and bright rather than ornate.

The marquise accents are the smartest move in the design. Brilliant Earth describes marquise diamonds as elongated stones with two pointed ends, and notes that the shape can create the illusion of a bigger diamond. Here, those stones sit above and beneath the center gem, wrapping the ring in a way that makes the profile feel tailored rather than stacked with extra weight. It is a useful cue for readers who want a ring that looks custom without relying on a halo or a more obvious vintage setting.

Brilliant Earth’s own customization model helps explain why this style has traction beyond celebrity coverage. The company says customers can start with either a diamond or a setting and build the rest online or with an expert, a process that makes this kind of mixed-shape composition more accessible than it once was. Platinum remains the most exacting choice in the mix: cool-toned, durable, and suited to a ring that has to support a substantial center stone without distracting from it. For buyers watching the market, the lesson is clear. The 2026 engagement-ring direction is not about louder sparkle for its own sake. It is about sculptural shapes, thoughtful side details, and settings that make a stone look larger, cleaner, and more intentional.