Keith Urban paid tribute to wife Nicole Kidman for her 53rd birthday! Urban and Kidman celebrated her big day on Saturday (June 20th) with Keith creating an Instagram post which featured his peeking from behind a bundle of balloons. “WHAT A GIFT JANELLE AND ANTONY KIDMAN BROUGHT INTO THE WORLD ON THIS DAY !!! Happy Birthday Babygirl,” Urban captioned the photo which also got attention from Kidman’s co-star on “Big Little Lies,” Reese Whitherspoon who commented, “Happy Birthday Nic!!”