Josh Brolin’s Fiancée, Kathryn Boyd, Shows Off Her Engagement Ring at Cannes — Plus See 10 More of the Most Stunning Celebrity Wedding Bands!

Congratulations are in order for Josh Brolin and Kathryn Boyd — they're engaged!

Click through the gallery to see 10 more stunning engagement rings that belong to A-list celebrities including Nicole Kidman, Jennifer Garner, Angelina Jolie and more!