
Scarlett Johansson’s fiance French journalist Romain Dauriac has unique taste! The dazzling Art Deco sparkler created a stir at the Venice International Film Festival, and rightly so-it features three round diamonds surrounded by a vintage rectangular setting with more diamonds.
George Pimentel/Getty Images, Taylor Hill/FilmMagic

When it came time to choosing a ring for Ashlee Simpson, beau actor Evan Ross decided to keep it within the family, selecting jeweler-to-the-stars Neil Lane who also designed big sis Jessica Simpson's sparkler. "A Vintage inspiration with a Contemporary feel using calibrated cut rubies gave that vibrant Art Deco feel," Lane says of the 5-carat marquise-cut diamond accented with rubies and 140 small white diamonds. "The navette shape evoked the romance (of the) Edwardian Era."
Jon Kopaloff/FilmMagic; Don Arnold/WireImage

This is one serious sparkler! Funny man Jason Sudeikis asked for Olivia Wilde’s hand in marriage with a round diamond surrounded by an emerald halo (to match her eyes!) and set in gold.
Dave Kotinsky/Getty Images, Jon Kopaloff/FilmMagic

Fergie's engagement ring from husband Josh Duhamel features a wide band with a 4-carat brilliant cut diamond. The H. Stern design also has cognac diamonds in a starburst pattern around the center stone.
Stephen Lovekin/Getty

Halle Berry's fiancé Olivier Martinez popped the question with a diamond and emerald Robert Mazlo engagement ring.
RAMEY PHOTO

Husband Jerry O'Connell proposed to Rebecca Romijn with a 6-carat yellow diamond engagement ring. "Since I had to get my ring resized when I was pregnant, I decided to change my setting with the help of my friend Lorraine Schwartz," Romijn told InStyle. "There's something sexy about a diamond dangling from your finger."
Donato Sardella/WireImage

Eric Johnson gave Jessica Simpson a 5-carat ruby ring in honor of her July birthday. "The ruby design for Jessica was perfection," says Neil Lane, the celebrity jeweler behind Simpson's engagement ring. "It's a classic design with a twist because the side stones are pear-shaped."
Landov (2)

Angelina Jolie's 10-carat diamond is a one-of-a-kind cut thanks to Brad Pitt. "Brad had a specific vision for this ring," Beverly Hills jeweler Robert Procop said in a statement. "He wanted every aspect of it to be perfect, so Robert was able to locate a diamond of the finest quality and cut it to an exact custom size and shape to suit Angelina's hand."
CelebrityPhoto.com; Howard Pasamanick/dpa/Corbis

As a sweetly romantic and commemorative gesture, Prince William presented Kate Middleton with his mother's Garrard Jewelers sapphire-and-diamond ring. He explained his decision, saying, "It's very special to me, Kate's very special to me as well, I thought it only right to put the two together." The 18-carat oval sapphire is surrounded by 14 diamonds and set in 18-karat white gold.
Mario Testino

The 10.02-carat emerald-cut diamond on Mariah Carey's Jacob Arabo engagement ring is in her preferred hue: pink.
Michael Loccisano/FilmMagic

Hockey player Mike Fisher asked for Carrie Underwood's hand in marriage with a yellow diamond ring by Jonathon Arndt.
INFphoto.com; Byron Purvis/AdMedia/Sipa USA

Jim Toth popped the question to Reese Witherspoon with a rare Ashoka-cut diamond. The 4-carat ring, a custom-design by the William Goldberg Diamond Corporation, is set on a pave diamond-and-platinum band. The unique cut also has 62 displayed facets and rounded corners to make it extra sparkly.
Kevin Mazur/WireImage; Dimitrios Kambouris/WireImage

Australian cricket player Shane Warne proposed to actress and breast cancer activist Elizabeth Hurley with a square-cut sapphire flanked by two trillion-cut white diamonds.
Dimitrios Kambouris/Getty; Richard Young/startraksphoto.com
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