Article continues below advertisementMillie Bobby Brown is retreating from Hollywood at the very moment her career has reached its commercial peak, choosing a quiet life on a rural Georgia farm as Stranger Things prepares to end amid what those close to her tell OK! is "emotional exhaustion" from growing up under relentless scrutiny.The final episode of the Netflix phenomenon aired on New Year's Eve, closing a series that transformed Brown, 21, from an unknown 11-year-old British actress into one of the most recognizable faces on the planet.