Of course, she's been promoting the line all over Instagram, and over the weekend she posted a skincare routine video apparently showing how she herself uses the products.
However, people immediately noticed that in the video — which has since been deleted from Instagram, but is still on YouTube — it doesn't look like Millie is using the products at all.
On Thursday, Millie took to Instagram again with a screenshot explaining the misunderstanding and said she's "still learning the best way to share [her] routines".
"I thought doing a quick video replicating my personal process for that night was okay, but that's not what was conveyed," she wrote. "I appreciate all of your feedback on this journey."