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Jessica Biel, Jason Bateman and Josh Gad are joining the growing number of celebrities taking part in Matt Damon's toilet strike and are protesting the lack of access to safe water and adequate sanitation for billions.

Watch as Bateman, Biel and Gad publicly declare their support in this funny but important ad and see how they've fared so far "not going to the bathroom until everyone in the whole world has access to clean water and sanitation".

Also, you can be the first to see new videos about Matt's strike and learn more about the water crisis every week by subscribing to his campaign's YouTube channel here.

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