LeAnn Rimes, Eddie Cibrian Renew Wedding Vows

LeAnn Rimes and Eddie Cibrian at the 36th Annual Toyota Pro/Celebrity Race held at the Toyota Grand Prix of Long Beach on April 14, 2012 in Long Beach, California. Ryan Miller/Getty Images

Game on, Will and Kate.

LeAnn Rimes and Eddie Cibrian's first wedding anniversary was last Sunday, April 22. But the country singer, 29, and actor, 38, waited until Friday to renew their vows in what appears to be a quiet, private affair.

"Renewed our vows today," Rimes tweeted Friday. "It's incredible to thank each other for the past year as husband and wife. Here's to another great year!"

The couple, whose romance infamously began as an extramarital affair while they shot Lifetime flick Northern Lights in 2008, gifted each other lavishly last weekend for the milestone. Cibrian gave Rimes a huge ring, featuring a giant green gem encircled by diamonds, while she bestowed her man with a blinged-out watch. ("He loved it so much, he wore it to bed," Rimes marveled.)

They began the celebration on Friday April 20 with a PDA-packed lunch at Toscanova restaurant in Calabasas, Calif.

Friday the 27th was a big day for vow renewals: Mariah Carey and Nick Cannon similarly re-pledged their love in Paris three days before their four-year anniversary. This Sunday, Prince William and Kate Middleton mark their first anniversary as a royal married couple.

Their plans?

"They will be at a friend's celebration this weekend, but will return to Anglesey in time for their first anniversary," a Palace aide tells Us Weekly. "They will celebrate the anniversary privately, something low-key at home."

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