Nicole Kidman and Keith Urban ended their nearly two decade marriage with a split in 2025, followed by a finalized divorce in early 2026. The available report confirms the breakup timeline but does not identify a publicly confirmed reason for the couple’s decision to separate. Kidman and Urban’s relationship lasted close to 20 years before the marriage came to an end. That lengthy history gives the split plenty of headline heat, but the facts currently on the table are limited to the separation and the completed divorce. So, Why Did They Break Up? There is no specific cause for the divorce established in the provided reporting. Claims about infidelity, conflict, or other private issues would be speculation unless Kidman, Urban, or official legal documents directly confirm them. For now, the cleanest receipt is the timeline: Nicole Kidman and Keith Urban split in 2025, and their divorce was finalized in early 2026 after nearly two decades together. Until either celebrity addresses the reason publicly, the breakup story has a date, but not a verified explanation.