First it was Mark Zuckerberg and Bill Gates. Now Iron Man's getting in on it.

He's nominated Thor himself, Chris Hemsworth, and his co-star in upcoming legal drama The Judge, Vincent D'Onofrio.

The Ice Bucket Challenge is to raise awareness for ALS / Lou Gehrig's Disease, and each of the contestants are challenged by the previous and, we're guessing, will make a donation to charities working with the disease.

We'll be back in twenty-four hours to see if Hemsworth or D'Onofrio takes up the challenge. The smart money's on Hemsworth.