Cara Delevingne, Emma Stone, and Adele are all making the "W" sign today as they pledge their support to World Water Day.
The initiative, which has teamed up with the charitable organisation Drop4Drop, aims to address the current clean-water crisis thst impacts 700 million people and kills 2,000 children every day.
"I am proud to support Drop4Drop and their work to help address the World Water Crisis," said Delevingne.
Past supporters have included Jennifer Lawrence, Katy Perry, Lady Gaga, Jay Z, and Beyoncé. You too can show your support by posting a photo of yourself making a "W" sign on social media using the hashtag #W4Water.
Experts have estimated it would cost $10 billion to remedy the water crisis, which is a billion dollars less than Americans spend on tea each year.
"Awareness is crucial," said Drop4Drop's co-founder Lucas White. "We are working to address this crisis, and are confident that the support and visibility we are generating online today will encourage big corporations and businesses to come alongside us and fund our crucial work in the communities that need it most."