How is she already 15 ? ?

Nicole Richie’s daughter Harlow is so grown up!

While Nicole tends to keep her family and kids out of the spotlight, she recently shared a rare photo of her 15-year-old daughter Harlow, whom she shares withJoel Madden.

In honor of Mother’s Day, Nicole posted a photo posing with her mom Brenda Harvey-Richie, her sisterSofia Richie, and Harlow.

“We all love you,” Nicole wrote, adding, “Happy Mother’s Day Queen.”

Honestly, I can’t get over how much they look like each other!

Although she rarely shares any photos of Harlow or her 13-year-old son Sparrow, Nicole has given some insight into her children’s lives — and apparently, Harlow is a fashionista like her, too.

“I see them developing into themselves,” she toldEntertainment Tonight. “My daughter loves fashion, but she has her own style. It doesn’t have anything to do with me.”

She continued, “She takes my clothes all the time…She’s wearing my current clothes now, she’s just like, ‘What do you have? That’s what I want. I’m taking it.'”

Can’t wait for the Harlow x House of Harlow collab one day!

A closeup of Nicole

A closeup of Nicole and Joel Madden

A closeup of Nicole

Nicole, Harlow, Sofia and Brenda all embrace while sitting on a chair together

A closeup of Harlow and Nicole with Brenda between them

A closeup of Nicole

A closeup of Nicole

A closeup of Nicole

A closeup of Nicole