Millie Bobby Brown’s romantic past reveals notable relationships and intriguing rumors shaping her personal life over time.

And for her 21st birthday, she ditched her signature brown locks and went bright ... atop a heart-shaped cake. Jake also recently gave a glimpse into his relationship with Millie on Valentine ...

Millie Bobby ... could double as a love letter. To celebrate Jake Bongiovi turning 23, she dropped a romantic photo carousel full of golden light, honeymoon glow, and heart-eyed vibes.

While many still see Millie Bobby Brown as the youngster who stole hearts as Eleven in the hit ... the symbol of their love was rescued. The "Runaway" rock stars recall living on a prayer in ...

Not that she showed up wearing her heart ... Millie to the Stranger Things season four premiere, captioning a pic from the evening, "Congratulations babe u deserve the world love you." ...