They’ve messed with the wrong mother. Julia Stiles took to Instagram to hit back at mommy shamers who criticized her for holding her newborn son, Strummer, incorrectly. The 36-year-old actress, who welcomed her baby boy with husband Preston J. Cook on Oct. 20, offered her haters a very stern message on Friday, Dec. 1.

“It was brought to my attention that in the previous photo I am not holding my baby correctly,” the Save the Last Dance star wrote. “Wow, I didn’t expect that. What was supposed to be a shout out of products I like, suddenly becomes an invitation to comment on my baby, and my ability as a mother. That’s the internet for you…”

On Nov. 28, Julia shared a photo of herself holding her little guy in a TULA baby carrier. “I haven’t worn a back pack since middle school. ?,” she captioned the cute pic. “Now I have a front pack. #jujube #tulababycarriers”

Despite the innocent nature of the photo, a handful of Julia’s followers attacked her for her placement of Strummer. “This is not how you hold a baby this young! It looks like she’s smothering her child!” one wrote, while another commented, “I can’t believe she would hold her baby like this — and then post a picture of it! Doesn’t she know this isn’t safe?”

In her subsequent post, Julia said that she purposely hid Strummer’s face from the camera — and insisted this is not the way she typically carries him. “I was trying to keep much of my son’s image private, including, I guess, his little feet,” she continued. “And it was just a photo taken at home, not how I normally carry him around. Thanks for the concern, anyway.”

The new mom also reminded the online parenting police that there are better things to do than pick apart her parenting skills. “But also, Instagrammers: instead of writing snarky comments about a 5 week old, try dancing around your living room to a Clash record,” Julia clapped back. “It’s way more fun.”