Nicole Kidman is talking about her love for Keith Urban. "It was my birthday, and he stood outside with gardenias at 5 a.m. on my stoop in New York. That is when I went,' This is the man I hope I get to marry,” explained the actress. "I believed by that point he was the love of my life," the Big Little Lies star said. "Maybe that's because I am deeply romantic, or I'm an actress, or I have strong faith as well, but I just believed, 'Oh, okay, here he is.'" The Aussie couple was married in 2006 and have been happily married for 18 years. Which celebrity couples are your favorites?