Kate Hudson posted a photo of her newly shaved head on Instagram on Wednesday. The new hairdo seems to have been done for a role Hudson recently took: a mysterious Sia musical project.

Earlier this month, Hudson shared an image of her and Sia’s public face and dance muse Maddie Ziegler together in a dance studio.

“Dance rehearsal with this bundle of excellence!” Hudson captioned the image.

A post shared by Kate Hudson (@katehudson) on

The newest post, and the first to truly show off Hudson’s bald head, appears to be a still from the upcoming project.

“Freedom,” the caption begins. “Compliments of @siathisisacting #OurBeautifulDirector.”

Freedom 🙌💇 Compliments of @siathisisacting ❤️ #OurBeautifulDirector

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The mysterious singer whose face is always covered posted the same image with the caption, “My girl @katehudson being a delight on set.”

One of the few times Sia has been seen without her trademark wig covering her face was last month, when she was spotted disguise free having lunch with Hudson, according to ET.

Hudson joins the ranks of Cara DelevingneKristen Stewart, and Stranger Things‘ Millie Bobby Brown to shave their heads nearly bald for a role.

Of her shaved head Delevingne said, “The more we embrace who we are as people and rely less on our physical attributes the more empowered we become. Beauty shouldn’t be so easily defined. It is limitless.”