Article continues below advertisementInside David Harbour and Millie Bobby Brown's On-Set DynamicSource: MEGADavid Harbour previously mentioned Millie Bobby Brown in several interviews. Millie Bobby Brown accused her Stranger Things costar David Harbour of harassment and bullying in a complaint, years after they began working on the hit Netflix series.Before the news emerged, the 50-year-old actor frequently spoke about Brown, 21, in interviews. Speaking with Yahoo! Movies in 2019, he revealed he had "an almost father-daughter relationship" with his "wacky" costar.