Kristen Stewart, Nicholas Hoult Complete ALS Ice Bucket Challenge With “Dirty Bath Water”

May have been gross, but anything for a good cause! Kristen Stewart and Nicholas Hoult completed the ALS Ice Bucket Challenge with their friend Scott Fahrendorf on Thursday, Aug. 21 -- with a twist!

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"Hathaway, get this. This is a f--king real challenge," said Stewart, 24, who was given the challenge by her pal Anne Hathaway. "In good faith you must believe this was all done with dirty bath water. Please be considerate of California water conservation."

Stewart and Hoult

Stewart and Hoult

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The Twilight alum and Hoult, 24, dunked their heads in blue buckets for as long as they possibly could. Afterward, Jennifer Lawrence's ex and Fahrendorf (who's previously worked as a crew member on Stewart's films On the Road and Camp X-Ray) grabbed a bigger bucket to drench the actress. The stars are currently filming Autobahn in Germany.

VIDEO: Celebs who've taken the Ice Bucket Challenge

After completing the ALS Ice Bucket Challenge

After completing the ALS Ice Bucket Challenge

Just like others who've accepted the dare, Stewart and Hoult then nominated some of their famous pals to follow suit.

VIDEO: Even more stars who've taken the ALS challenge

Watch the video now and find out who they chose! (Warning: F-bomb alert!)'s Latest Videos