Overview
- The couple announced the engagement in a joint Instagram post on Sunday, Aug. 9, 2026, sharing candlelit sunset photos from a seaside proposal.
- Photos show Carmen Montero Mundt wearing a large oval yellow diamond and the pair captioned the post simply with a ring and white-heart emoji.
- Jewelry experts quoted by multiple outlets estimate the center stone at roughly 8–10 carats and value it as high as about $1.35 million, with the final price depending on color intensity and whether the diamond is natural or lab-grown.
- Montero Mundt, 28, has a finance background with links to Ruffer LLP and is a co‑founder of the skincare brand Barriers, while Russell is a 28‑year‑old Mercedes Formula 1 driver.
- Fellow drivers and teams quickly sent congratulations after the post, and the couple have not announced a wedding date or further personal plans.