Millie Bobby Brown is entering 2026 with a new brand she is proud of. The Stranger Things actress, 21, opened up about what her latest clothing line, Mills, means to her while announcing that the items will now be sold in Walmart. While rocking a pastel pink cardigan, Brown wrote via Instagram on Thursday, January 8, "Officially at @walmart ✨ My new fashion line for the next generation, Mills, is a love letter to my younger self and to every girl in their self-discovery era.