Fans are going down the rabbit hole of what led to Nicole Kidman and Keith Urban ’s split.

One day after news of their separation broke , Oscar winner has filed for divorce from the country music singer—citing "irreconcilable differences," per court documents obtained by NBC News.

While followers are just learning of the breakup, E! News has learned that Kidman, 58, and Urban, 57, have been living apart since the beginning of the summer—with the actress residing in their family's Nashville home with daughters Sunday , 17, and Faith , 14, and the musician moving into his own place in the same city.

Neither star has publicly commented on the breakup. However, E! News learned that Kidman did not want to part ways with Urban and that she'd initially been trying to save t

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