Nicole Kidman
The Aussie star shrieked as she accepted her challenge, then nominated Jason Bateman!
John Travolta
The actor happily accepted the ALS Ice Bucket Challenge!
Sarah Jessica Parker
The Sex and the City star wore only a towel when she accepted her challenge!
George W. Bush
The former president took it like a champ, then nominated his pal (and fellow former president!) Bill Clinton.
Channing Tatum & Jenna Dewan-Tatum
The super-cute couple accepted the ALS Ice Bucket Challenge together!
Verne Troyer
The Austin Powers alum pointed out that California is in a drought, so, sticking an Oreo cookie in his mouth, he "improvised" and accepted the challenge by getting doused in ice cold milk!
Kevin Hart
The Think Like a Man, Too star accepted his challenge (shirtless!) and nominated Gabrielle Union, Dwyane Wade and Lebron James.
Drake
The rapper accepted his challenge onstage, with Lil Wayne dumping the bucket of ice over his head. He then nominated Beyoncé!
Anna Wintour
The Vogue editor-in-chief accepted the challenge from daughter Bee Shaffer, then nominated Roger Federer and Dominic West.
Behati Prinsloo
Adam Levine's wife still looked model perfect as she accepted her challenge!
Hayden Panettiere
The mom-to-be accepted the challenge, nominating Kasey Musgraves, Wladimir Klitschko and her unborn child.
Rachael Ray
The cooking guru and the staff of her show accepted their challenge from Carrie Keagan! They in turn nominated Regis Philbin, Sharon Osbourne and Sesame Street!
Kermit the Frog
This Muppet wasn't afraid to accept the ALS Ice Bucket Challenge!
Gwyneth Paltrow
The blonde beauty accepted the challenge and nominated her ex Chris Martin.
Liam Hemsworth
Dressed in a Teenage Mutant Ninja Turtle costume, the Hunger Games star took on the challenge without his bow and arrow.
Robert Pattinson
This ALS ice bucket challenge involves a saucepan.
Ben Affleck & Jennifer Garner
The husband and wife team made their ice bucket challenge a family affair.
Ashton Kutcher
The dad-to-be let Wilmer Valderrama do the honors before nominating Dax Shepard, who was waiting in the wings.
Tom Cruise & Chris McQuarrie
The Mission: Impossible 5 actor and director accepted Hugh Jackman's challenge and made donations on behalf of every member of the movie's cast and crew.
John Krasinski
Emily Blunt soaked her husband...
Emily Blunt
...and John Krasinski ambushed her in retribution.
Foo Fighters
Frontman Dave Grohl recreated the iconic scene from Carrie.
Nicole Scherzinger
The "Wet" singer squealed as she got, well, wet.
Gordon Ramsay
Before the Hell's Kitchen host got doused by his kids, he challenged Bradley Cooper to follow suit.