The most expensive celebrity engagement rings will shock you. See which stars — including Kim Kardashian and Meghan Markle — come out on top.

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From Gwen Stefani's $500,000 sparkler to Mariah Carey's 35-carat emerald-cut diamond, here are the most expensive celebrity engagement rings ever.

The most expensive royal engagement ring belongs to Grace Kelly, the Hollywood actress who became Princess of Monaco. Kelly’s Cartier ring was given to her by Prince Rainier III in 1956.

Coming in with the third-most expensive royal ring is the Duchess of Sussex, whose three-stone diamond style is worth £150,000 ($193,000) or more, according to the jewelry expert.

Cardi B in a black dress with shiny pointy nails and wearing a large engagement ring. Elizabeth Taylor arguably knew more about being engaged than any other celebrity in Hollywood. The ...

Celebrities have been known to splurge on expensive engagement rings. In 2016, billionaire James Packer reportedly spent $10 million on a ring for Mariah Carey. Kris Humphries auctioned off the ...

Kate Middleton's unique 12-carat sapphire — surrounded by diamonds, no less — popped perfectly with her navy dress when the royal couple announced their engagement in 2010.. The $500,000 heirloom ...