Nicole Kidman is going back to her roots.

In fact, the Oscar winner opted to rock her natural curly hair during a recent family vacation.

As seen in pictures posted on Instagram Aug. 19 , Nicole—clad in a blue floral summer dress—let her strawberry blonde coils loose while embracing her daughters Sunday Rose , 17, and Faith Margaret , 14, on a balcony overlooking the ocean.

She also kept her tresses down in a group photo with younger sister Antonio Kidman and niece Lucia Hawley .

"Summer memories," Nicole wrote in the caption. "Now back to school."

Indeed, the 58-year-old and her husband Keith Urban make education a priority for their girls. As Sunday Rose put it, school is one of the "two big rules" of the household.

"The first was that I couldn’t explore any kind of

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