After nearly 20 years of marriage, Nicole Kidman and Keith Urban have separated — news that sent a wave of shock through both Hollywood and the country music world. ‘They’ve Been Living Separately for a While’While the news has taken many by surprise, there were signs behind the scenes. Read More: Keith Urban + Nicole Kidman Had Way Too Much Fun on the ACMs Carpet [Pictures]“They’ve been living separately for a while now,” a source revealed, adding that the longtime couple had gradually grown apart — especially as both dove into demanding, high-profile projects. Kidman has recently been filming Practical Magic 2 in London, while Urban has been on the road for his High and Alive World Tour. Nashville Roots, Separate PathsKidman and Urban have called Nashville home since 2008, raising their family there while carefully balancing the demands of fame and career.