Millie Bobby Brown Becomes UNICEF’s Youngest-Ever Goodwill Ambassador  The ‘Stranger Things’ actress was recognized during World Children’s Day. The United Nations International Children’s Emergency Fund, UNICEF, welcomed the 14-year-old as an ambassador for the non-profit. “Given UNICEF's global role as the world's leading voice for children and young people, to be the youngest-ever Goodwill Ambassador for UNICEF is more than an honor. It's a powerful privilege.” Millie Bobby Brown, at UN New York Headquarters Brown plans to use her influence to highlight issues younger people face and encourage fans to raise their own voices. “I will speak out for the millions of children and young people whose voices have been silenced for far too long.” Millie Bobby Brown, at UN New York Headquarters The Emmy award-nominated actress wants to represent those who “haven’t yet had a seat at the table.” “Most of all, I will make sure children and young people know their rights and I will do everything I can to empower them, to be the change they want to see in the world." Brown co-hosted UNICEF’s 70th anniversary in 2016.