Millie Bobby Brown and Sadie Sink — who portray Eleven and Max Mayfield on Stranger Things costars, respectively — have forged a real-life bond that rivals the one their characters share on screen. Look, I know the term "best friend goals" is sorely overused by now, but that's truly the first phrase that comes to mind when I see pictures of the costars. When they're not busy kicking Demogorgon butt or hanging at the Starcourt Mall on the Stranger Things set, Sadie and Millie are likely goofing off on the red carpet together, praising each other's talents on social media, or wearing coordinated Halloween costumes, if it's that time of year. To fully appreciate these two peas in a pod and their sweet-as-Scoops-Ahoy-ice-cream friendship, we're taking a look back at all their adorable photos together. On a cuteness scale of 1-10, it's safe to say this duo is a solid 11 (pun fully intended).