Anne Hathaway challenged Kristen Stewart to the ALS Ice Bucket Challenge, and naturally KStew didn't back down.
In fact, the 24-year-old actress, her "Equals" co-star Nicholas Hoult and pal Scott Fahrendorf were totally down for the cause.
"Hathaway, get this. This is a f--king real challenge," Stewart tells the camera before the three dunk their faces into buckets of ice water, and hold their fully submerged heads under for about 10 seconds, before dumping the remaining water all over themselves.
At the end of the video, Stewart notes that the challenge was done with "dirty bathwater," and asks viewers to "Please be considerate of California water conservation."
If you'd like to donate and help spread awareness about ALS, head over to www.alsa.org.