Behold, the humble bobby pin. It's small. It's powerful. It's an essential building block of so many hairstyles, and yet, the hair accessory tends to get ignored in favor of flashier clips and pins.

Taking to her Instagram, MBB – who recently revealed her name isn't actually Millie Bobby Brown at all – served major 1950s ...

In numerous shots, her character has styled her hair in a deep side-part and has pulled back a tiny strand from the front of her face and pinned it back with a single bobby pin. And if that doesn ...