For a screening of Stranger Things 3 in NYC, the actress walked the red carpet wearing a powder blue floral midi that looks like it came from your local vintage shop (it actually came from Markarian). Millie accessorised with diamond drop earrings and glitzy mauve heels – the perfect additions to her adorably retro ensemble.

"Stranger Things" Season 3 New York Screening
Millie kept her makeup super low-key (brows, mascara, and just a hint of lip color), so that she could go above and beyond with her new, honey