Millie Bobby Brown is dropping jaws on the beach as she strips to a minuscule string bikini while proving she's an "11." ...

Millie Bobby Brown is stunning in her skimpy floral bikini on a tropical beach, but fans are asking questions about her ...

Millie Bobby Brown gave fans a glimpse of her new hair color while modeling a tiny plunging string bikini on the beach on ...

The Stranger Things actress, 21, posed up a storm in a trio of beachside photos, wearing a tiny string bikini that showed off her incredible physique. Millie's blue and green paisley-patterned bikini ...

Millie Bobby Brown was only 11 years old when most of her fans met her in the first season of Stranger Things –– but the actress is not so little anymore as she just celebrated her 21st birthday.