Shiloh pool swimming trunks no shirt

Shiloh prefers boys' trunks to a frilly girls' swimsuit á la sister Zahara. Photo: Us Weekly

Just when she thought it was safe to go into the water, 4-year--old Shiloh Jolie-Pitt is making waves thanks to her choice of swimwear.

Angelina Jolie and Brad Pitt's towheaded tomboy was photographed in Berkeley, Calif., going for a dip in a pair of long blue swim trunks while 5-year-old sister Zahara looks on in a girlie one-piece.

"She likes to dress like a boy. She likes tracksuits, she likes [regular] suits," Jolie, 35, says of Shiloh, whose closet also includes neckties, fedoras, cargo pants, and hoodies. "She wants to be a boy. So we had to cut her hair. She likes to wear boys' everything."

Jolie, who is also mom to Maddox, 9, Pax, 6, and twins Vivienne and Knox, 2, adds that she believes Shiloh is making fascinating choices when it comes to her clothing, and the actress would never force her into something frilly simply because society says so.

"I think that is just bad parenting," says the "Salt" star. "Children should be allowed to express themselves in whatever way they wish without anybody judging them, because it is an important part of their growth."

Family therapist and sister site ParentDish's "AdviceMama" Susan Stiffelman agrees.

"Each child develops in their own unique way, and as long as Shiloh -- rather than her parents -- is making her clothing choices, it's not a problem," Stiffelman tells StyleList.

"We're all best served to acknowledge that many 4-year-olds pass through stages of experimentation, where little boys try on ballet costumes and little girls dress like cowboys, without it meaning they're gender confused."

What's most important, says the "Parenting Without Power Struggles" author, is to encourage children to dress to suit their own individual preference and style.

Says Stiffelman, "If Zahara is drawn toward girlie-girl outfits and Shiloh is dressing like a tomboy, then each will know they're being seen and cherished as is, which is one of the healthiest gifts a parent can give to their child."

Then here's one extremely healthy family: Check out the Jolie-Pitt kids over the years.

In related news, is Shiloh one of Hollywood's most stylish kids? Cast your vote now!