It wasn鈥檛 the explosive action sequences, the shout-out to Blockbuster Video, or even the old lady getting punched in the face that resonated with some viewers of the new Captain Marvel trailer.

It was that star Brie Larson isn鈥檛 shown smiling much.

The Marvel Studios , which has racked up more than 36 million views in less than a week, led some social media users to onto the actress鈥� face. In response, other users posted images of Marvel men not bearing their teeth. Others countered with their own Photoshop wizardry, upturning the mouths of , .

Larson, who won an Oscar for Room in 2016, posted those images without comment in . The call for her superhero to 鈥渟mile more鈥� echoes what some women have called a form of sexist harassment that implies a woman鈥檚 expression should be controlled for the pleasure of men. The outrage spawned the social media hashtag 鈥溾�� in which mostly women and young girls shared pictures of themselves sporting a variety of facial expressions.

鈥淎bout time Marvel gives us a solo female superhero lead with an actress that fights for what鈥檚 right on and off screen,鈥� . 鈥淏e a HERo with or without a smile.鈥�

The actress hasn鈥檛 commented explicitly about the outrage, but wrote about the #selfiesforbrie hashtag .

鈥淚 loved seeing all your expressions. Moody or smiling or coy or fierce or whatever is YOU," she wrote. 鈥淭hank you. It was truly a highlight of these few wild days.鈥�