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.

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.

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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