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Take a look at Jessica Biel’s engagement ring! While the 30-year-old actress hasn’t been one to show off her sparkler ever since she and fiancé Justin Timberlake confirmed their news in January, the ring made a public debut yesterday when she went out with her beau in Los Angeles. And it’s a rock—the custom piece features a large square-cut diamond in a vintage-inspired setting.

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Natalie Portman is officially Mrs. Millepied! The Oscar-winner tied the knot with her choreographer beau Benjamin Millepied, and the pair confirmed their marriage when they both wore wedding rings to Sunday’s Oscars. The jewelry designer behind the rings is Jamie Wolf, who also designed Portman’s engagement ring. “It was a pleasure to continue working with Natalie and Benjamin,” Wolf told InStyle.com exclusively. “I was flattered to have the opportunity to make two additional delicate diamond rings to encase and complement the initial piece.” While the bride doubled up to emphasize the engagement ring, Wolf created a simpler look for the groom, a satin-finished platinum band. And, as with all of Wolf’s pieces, the rings were crafted from recycled platinum and conflict-free diamonds. (See more at jamiewolf.com.) “I am happy to see them wearing the rings and, as always, wish them the all the very best,” Wolf added.

Plus, see more celebrity rings in the gallery!

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Finn Hudson (Cory Monteith) proposed to Rachel Berry (Lea Michele) on Glee this week, and she said yes! So, how did the engagement ring—a heart-shaped diamond in channel setting featuring six smaller round diamonds—come to be? We caught up with Paul Breuninger, the show’s prop master, to find out. “When I picked the rings, I tried to be very character specific, and consider what’s proper and appropriate for Lea and Cory,” Breuninger told InStyle.com of shopping for the fictional high school students. After picking out several options, he showed them to a few staffers, including Ms. Michele. “Lea seemed fine with all of the choices, so we deferred to Cory, who made the final decision in the end.” (Like a true engagement!) The designer, however, remains unknown. “TV is too fast to bring in a lot of big-name designers, but letting Cory and Lea in on the process gave them a feeling a participation, so they could better get into their performances.” How romantic!

Plus, see more celebrity engagement rings!

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When Paige, Rachel McAdams‘s character in The Vow, loses her memory after a car accident, this elegant 18kt gold eternity band by Parade Design serves as a reminder of her life prior to the crash. “It seemed to really match Leo and Paige because it was an arty piece,” the actress told InStyle.com of the ring at The Vow‘s Hollywood premiere. McAdams’s costar Channing Tatum added that she helped choose the design. “She’s a sculptor in the movie, and Rachel made the cool decision that she probably wouldn’t want some big ring because she always has clay all over her hands,” the actor said. However, McAdams noted one issue: ”Although the clay wound up sticking in those leaves!” Shop the design for $600 (visit paradedesign.com for stores), and catch it on the big screen when The Vow hits theaters this Friday, February 10th.

Plus, see more celebrity engagement rings! 

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—  Andrea Simpson

Katrina Bowden accessorized her white Amsale gown at the Screen Actors Guild Awards with a gorgeous new accessory—an engagement ring! Her rocker fiancé, Ben Jorgensen of the band Armor for Sleep, popped the question just the night before in a suite at the Four Seasons Hotel in Los Angeles. “It was a huge surprise,” the 30 Rock star told InStyle.com. “We’d talked about it, but I didn’t know when it was going to happen.” And the sparkler—a cushion-cut with two princess stones on each side—was perfect for her taste: “It’s a beautiful ring. I like antique, gorgeous rings.” Between this and the white dress—she already looks ready to walk down the aisle!

Plus, see more celebrity rings in the gallery!

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— Sharon Clott, with reporting by Lindzi Scharf