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Nicole Kidman "feels very betrayed" in her split from Keith Urban, a source tells PEOPLE

The Oscar winner filed for divorce in Nashville on Tuesday, Sept. 30, one day after their separation was made public

The longtime couple married in 2006 and they share two daughters, ages 17 and 14

Nicole Kidman and Keith Urban have called it quits after 19 years of marriage, and a source tells PEOPLE, "She feels very betrayed."

"Nicole's hurt and feels betrayed," adds another source. "It's devastating to her. She's shocked."

On Tuesday, Sept. 30, the Oscar winner, 58, officially filed for divorce from the country singer , 57, in Nashville courts after news of their separation came to light the day prior .

Reps for Urban and Kidman did not respond to PEOPLE's requests for com

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