Kate Hudson Posts New Pic of Her Buzz Cut, Says the Style Is 'Compliments of Sia'

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Kate Hudson is really digging her new summer 'do.

The 38-year-old actress bid farewell to her trademark blonde locks and shaved her head for a role on a project with Sia. On Wednesday, Hudson shared a photo of her new buzz cut and credited the "Cheap Thrills" singer for her edgy new hairstyle. "Freedom ?? Compliments of @siathisisacting ❤️ #OurBeautifulDirector," she captioned the image.

Freedom 🙌💇 Compliments of @siathisisacting ❤️ #OurBeautifulDirector

A post shared by Kate Hudson (@katehudson) on

Sia then re-posted the pic to her Instagram, writing: "My girl @Katehudson being a delight on set."

WATCH: Kristen Stewart Shaved Her Head and Dyed Her Buzz Cut Blonde -- See the Dramatic Transformation!

A day prior, Hudson put up another photo of herself posing with Hamilton and Smash star Leslie Odom, Jr., and the super close-up selfie made it look as though her buzz cut was already in full force. "In the room where it's all happening... with @leslieodomjr," she captioned the pic, leading some to speculate that Odom is also involved in Sia's secret project.

In the room where it's all happening... w/ @leslieodomjr 🌟

A post shared by Kate Hudson (@katehudson) on

Buzz cuts seem to be all the rage with actresses this year. In addition to Hudson, both Cara Delevingne and Kristen Stewart have shaved their heads for roles.

WATCH: Sia Accidentally Shows Her Face During Windy Concert at Red Rocks in Colorado

While Hudson just underwent a major hair transformation, Sia went nearly unnoticed without her stage wig when she was recently spotted heading to a meeting with the actress. Check out the 41-year-old singer's everyday look:

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