Brittany McMillan is an American activist known for her work in the LGBTQ+ community. She gained recognition for creating the first national day of awareness against bullying, called Spirit Day, which encourages people to wear purple in support of LGBTQ+ youth who face bullying and discrimination. In addition to her activism, McMillan is also a writer and speaker, focusing on issues related to LGBTQ+ rights and mental health. Her efforts have contributed to raising awareness about the challenges faced by LGBTQ+ individuals, particularly in schools and communities across the United States.