Another 10++ Kelly Brown Eleven Stranger Things Kelly Brown Millie Bobby Brown. The performer | millie bobby brown. Millie bobby brown (born 19 february 2004) is an english actress and producer. But it should come as no surprise that millie bobby brown, the awesome actress who plays her millie previously told vulture: Millie bobby brown has revealed what she thought about eleven and mike splitting up in stranger things… and boy, did she not hold back!