(RNN) - What will Cher, Julianne Moore, Ricky Martin, TV talk show hosts, social media users and the Jersey Shore's Pauley D. all be doing Thursday?
They are all-in on a movement that will take America by storm, and it has nothing to do with Occupy Wall Street.
MTV, Facebook and even local landmarks will also join in on the pledge to "go purple" in support of lesbian, gay, bisexual and transgender (LGBT) youth.
"With their support, millions of Americans will help remind countless young people that it's OK to be who you are," said Seth Adam, communications and publications manager for the Gay and Lesbian Alliance Against Defamation (GLAAD).
Thursday marks the second-annual Spirit Day, which teenager Brittany McMillan started as a response to several LGBT youths who took their own lives during the past few years because of bullying.
"At the end of the day, I want Spirit Day to make just one person feel a little bit better about his or her self, to feel safe enough in their own skin to be proud of who they are," McMillan said in an interview with GLAAD. "And even if it only stops one person from ending their life, that will be enough."