Page Six is breaking down all the celebrities who have called it quits this year, including what led to their separation.

Here’s an inside look at the actors, musicians and reality TV stars whose love wasn’t meant to be forever.

Nicole Kidman and Keith Urban

Nicole Kidman and Keith Urban have separated after 19 years of marriage , Page Six confirmed on Sept. 29.

“Sometimes relationships just run their course,” a source told Page Six, adding that Kidman “did not want the separation and was trying to save things.”

The actress and country music singer have been living apart “since the beginning of summer,” multiple sources told TMZ , who was the first to break the news.

The outlet reported that Kidman has been caring for their two children: Sunday Rose and Faith Margaret.

“[Kidman

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