Selma Blair has a new hairdo.

The “Cruel Intentions" star, who revealed her MS diagnosis in October, took to Instagram this week to share a photo of her young son, Arthur Saint Bleick, shaving her head with an electric razor.

"People. #selmablair #arthursaintbleick. Back to my roots,” she captioned the photo, in part.

Though the actress, 46, didn't say why she chose to shave her hair, Blair reportedly agreed with one person who wrote, “Hair is so hard to deal with when you can’t lift your arms above your head,” per Women’s Health.

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Many of Blair’s fans and supporters were quick to comment on the photo, which had more than 100,000 likes as of Saturday afternoon.

“You are a warrior woman,” wrote one person.

“I love Arthur’s calm spirit,” said another.

An error occurred while retrieving the Instagram post. It might have been deleted.

“Nice! A boy who cuts his mom’s hair is helping her change her life,” wrote a third.

“Yes, ponytails for me since diagnosed,” commented a fourth.

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“I love you in pixie! Like the ‘Friends’ episode you did!” said another, referring to the time the actress donned the hairstyle during an appearance on the show in 2002.

Blair often takes to the photo-sharing platform to post about her ongoing battle with MS, which the National Multiple Sclerosis Society describes as an “unpredictable, often disabling disease that disrupts the flow of information within the brain, and between the brain and body.”

In early May, for instance, Blair shared a post about struggling with her MS treatments.

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“Here’s a truth. I feel sick as all hell. I am vomiting and all the things which are not polite to speak of. My son ran away. From me. I have to get him to school. The medical treatments take their toll,” she wrote, in part, at the time.