Millie Bobby Brown is turning her sass up to 11.

The actress had no problem shutting down a photographer who yelled at her to smile for the camera during the Nov. 13 premiere of Stranger Things season five in London.

As she made her way down the red carpet in a strapless black corset gown from Ashi Studio, Millie opted not to flash her pearly whites—instead striking a serious pose—leading to the quippy exchange.

“Smile?” she retorted. “You smile!”

To emphasize that she’s had enough, the 21-year-old turned around and sashayed away from the photographer.

And Millie is no stranger to a clapback. After facing unwarranted comments about her appearance earlier this year, she called out online critics accusing her of “aging so badly,”

“I want to take a moment to address something that I think is bigger than just me, something that affects every young woman who grows up under public scrutiny,” she began in a March Instagram post. “I started in this industry when I was 10 years old. I grew up in front of the world, and for some reason, people can’t seem to grow with me.”