India, Oct. 1 -- Actor Nicole Kidman (58) and singer Keith Urban (57) have reportedly separated after nearly two decades of marriage, according to TMZ. A source told the outlet, "Keith has acquired his own residence in Nashville and has moved out of their family home," adding that Nicole is "holding the family together through this difficult time since Keith has been gone". "She (Nicole) didn't want this. She has been fighting to save the marriage," the source added. Whether the separation will lead to divorce remains unclear. As of now, neither Nicole nor Keith has publicly commented on the situation. Nicole and Keith first met in 2005. They confirmed their engagement in May 2006 and tied the knot a month later in a ceremony at St. Patrick's Estate in Australia. The couple share two daughters: Sunday Rose, 16, and Faith Margaret, 14. HTC...