By Kelsey Glein
Updated Mar 23, 2016 @ 11:30 am
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adele/instagram

Yesterday marked World Water Day, and the celebrities took to social media in droves to support the cause. The United Nations created the day to raise awareness for a multitude of water-related issues, most importantly the fact that over 663 million people don’t have regular access to clean water.

One of our favorite 'grams? Adele's snap that she shared from the stage of her concert at London's O2 Arena, which she captioned: "Show your support for @drop4drop's mission to get clean water for all. W is for...WATER! #worldwaterday #w4water."

Check out the stars who have thrown their support behind #WorldWaterDay below.

Cara Delevingne:

Harry Styles:

Lady Gaga:

Gisele Bündchen:

Lucy Liu:

Niall Horan:

Jennifer Lawrence:

Bella Thorne:

Jason Mraz:

Adele:

Alicia Silverstone:

Jennifer Hudson:

Pink:

Alicia Keys: