Just one day after news of their separation shocked fans around the world, Nicole Kidman has officially filed for divorce from Keith Urban, ending their nearly two-decade-long marriage. According to court documents obtained by TMZ, Kidman cited “irreconcilable differences” as the reason for the split. Despite the division of time, both Kidman and Urban have agreed to make all major decisions regarding their daughters, such as education and healthcare, together. “She’s been holding the family together,” a source told TMZ, adding that the Big Little Lies star had been deeply committed to salvaging the marriage. October 2006: Urban checked himself into rehab for drug and alcohol issues at the request of Kidman.