Today (March 22nd) is World Water Day, a time for everyone to get together and show our support for the 700 million people who currently don’t have access to water.

Yup, you read that right. 700 million people.

With a huge figure like that, it’s vital that we get talking about the clean water crisis. A whole host of famous faces have spoken up and backed this awesome cause, including Niall (sporting both glasses AND hat, swoon), Stella McCartney, rapper Example and Late Late Show host James Corden.

You can get involved too – it’s super easy. All you have to do is get someone to take a photo or video of you making the ‘W’ sign with your hands, and share it online with a statement of your choosing explaining what ‘W’ means to you.

It could be that ‘W’ is for ‘Whatever it takes’, or even ‘Water for all’. Your choice. Whack on the hashtag#W4Water and you're all set to spread the message.

Head to Drop4Drop’s website or follow them on Twitter to find out more about this amazing campaign.

Here's why we need you to get involved:

- 663 million people in the world do not have access to safe water. This is roughly one in nine of the world's population

- Half of the world’s hospital beds are filled with people suffering from water related diseases (UN)

- The water and sanitation crisis claims more lives through disease than any war claims through guns (UN)

- 443 million school days are lost each year due to water related illness (WHO/UNICEF)

- Women and children collectively walk 200 million miles a day to collect, often dirty and unsafe, water 1.5 million children die every year due to water related diseases