"Of course, people can look at it as pressure or scary, but I think that's the most exciting part of my job," she admitted. "People are all looking at me, 'What are you going to say, Millie?' I'm going to say, 'Young girls deserve an education. Young people everywhere deserve equal rights. [You] deserve to love the people that you want to love. Be the people that you want to be and achieve the dreams that you want to achieve.' That's my message."
In 2018 Brown was named UNICEF's youngest ever Goodwill Ambassador. "It's a dream come true to become a UNICEF Goodwill Ambassador," she said in a statement at the time. "It's a huge honor to join such an impressive list of people who have supported UNICEF over the years. I am looking forward to meeting as many children and young people as I can, hearing their stories, and speaking out on their behalf."