Raise a glass to Willow Sage Hart 's new chapter.

The 14-year-old daughter of Pink and husband of 19 years Carey Hart looked more grown than ever in a photo of her first day of high school.

In the pic shared to Instagram Sept. 4 , Willow—rocking a cropped salmon-colored button-up shirt and a pair of blue jeans with a white belt—smiled for the camera while balancing a backpack on her shoulder and two thermos in her hands. To top of her more mature appearance, the teenager wore her short hair in a '70s-style side part.

And Willow wasn't the only Hart family member embarking on a new chapter this fall. In a second slide, Carey shared a snap of his and Pink's 8-year-old son Jameson Moon Hart keeping it casual in a white shirt, multi-colored shorts and orange sneakers for h

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