A 2022 post came back to haunt Millen in October when the Advertising Standards Authority upheld complaints about a TikTok of her stay at The Savoy not being clearly identifiable as marketing communications. Her luxurious life in the countryside continued to enthral audiences regardless, and Millen published a guide to reconnecting with nature, Evergreen. Standout campaigns include attending Goodwood Revival with Aston Martin and collaborating with Clive Christian to discuss the perfume house’s craftsmanship.