The list just keeps growing and growing.
We've already watched Jennifer Lopez, Lady Gaga and CBS News' Gayle King and Norah O'Donnell get doused with ice-cold water. CBS News' Bob Schieffer, host of "Face The Nation," also accepted the challenge and joined the bucket brigade.
But now a new round of celebrities are taking on the ALS Ice Bucket Challenge. There's James Franco going pantless and Ben Affleck recruiting his wife, Jennifer Garner, to join right on the spot. Oh -- and Charlie Sheen puts a twist on the entire viral campaign. He even calls out his former "Two and a Half Men" co-stars.
The Ice Bucket Challenge is helping to raise both money and awareness for amyotrophic lateral sclerosis (ALS), also known as Lou Gehrig's disease. The ALS Association says it received $15.6 million in donations between July 29 and Aug. 18 from people who took videos of themselves getting hit with a bucket of cold water.
We expect additional celebrities to take the plunge as many more have been "nominated," including Neil Patrick Harris and Zach Braff, to name a few.
See some of the latest celebrity videos below: