Keith Urban and Nicole Kidman celebrate their 11th anniversary with the sweetest messages ever

Time really does fly!

Keith Urban and Nicole Kidman celebrated their 11th wedding anniversary on Sunday, and they are still as adorably in love as ever.

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In fact, the country crooner says it still feels like his Oscar-winning wife is still his girlfriend!

"Happy Anniversary Babygirl [sic]," Urban wrote on Instagram on Sunday, captioning a gallery of several sweet and candid selfies of him and Kidman. "Eleven years and you still feel like my girlfriend!!!"

Kidman shared a sweet throwback pic to their wedding day on her Facebook page, writing: "11 years of love that I thank God for every day. I love you Keith Lionel more and more. Happy anniversary."

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The anniversary celebrations cap off a winning month for the Aussie couple, where Kidman celebrated her 50th birthday and Urban, 49, swept his categories at the CMT Awards, giving thanks in his speech for his wife's support and input.

PHOTOS: See the happy couple together