Ronda Rousey was up for the challenge that her boss Ultimate Fighting Championship (UFC) president Dana White had dared her to do. The first and defending UFC Women's Bantamweight Champion literally got soaked in ice water, but it was for a good cause.

Rousey visited the Fox Sports studios in Los Angeles to do the challenge. She came looking scrupulously stylish in a figure-hugging dress and a pair of high stilettos. Rousey had her hair tied in a bun in a back with light and fresh make-up and she had a pair of dangling earrings to complete her outfit.

Before Rousey did her ice bath, she called out Sylvester Stallone, Dwayne "The Rock" Johnson, and Gina Carano for the ALS Ice Bucket Challenge.

Video courtesy: YouTube/Fox Sports Live

The ice cold craze was initiated by ALS Association whose mission is to fight and treat Amytrophic lateral sclerosis (ALS) or what is commonly referred to as Lou Gehrig's Disease. The campaign kicked off on July 29 and since then, nearly 150,000 people have donated, according to Time. Reportedly, ALS Association have received $5.5 million so far.

ALS spokesperson Carrie Munk has said in a statement that the organisation is "thrilled and completely amazed" at the people's gracious reception and the cash donations that they have received.

Barbara New House, the President and Chief Executive Officer of the ALS Association said in a press release posted on the organisation's official Web site that the public reaction has never been this great in the history of disease. "We couldn't be more thrilled with the level of compassion, generosity, and sense of humour that people are exhibiting as they take part in this impactful viral initiative," Ms. Newhouse said. She added that they were not only thankful for the increasing value of donations but also the people's awareness of the disease.

Celebrities and sport personalities have also taken the plunge and joined the ice cold craze. Here are some of the big names who have all done the ALS Ice Bucket Challenge, from Mark Zuckerberg, Justin Timberlake, Dez Bryant, Tony Romo, and more.

Justin Timberlake

Video Courtesy: YouTube/JustinTimberlake

Mark Zuckerberg

Dez Bryant and Tony Romo

Video Courtesy: YouTube/ThrowUpTheX

Paul Bissonnette

Video Courtesy: YouTube/Bradley Friesen

Jimmy Fallon and The Roots

Video Courtesy: YouTube/The Tonight Show Starring Jimmy Fallon

Aaron Rodgers

Video Courtesy: YouTube/thirdtom

Elizabeth Banks

Video Courtesy: YouTube/AlexSp12TV

Carson Daly, Adam Levine, and Blake Shelton

Video Courtesy: YouTube/Mor Turgeman

NY Giants LB Mark Herzlich, RB Andre Williams, and DE Mathias Kiwanuk

Video Courtesy: YouTube/Becton Productions

Emmy Rossum

Video Courtesy: YouTube/cooltv482

Jordan Staal

Video Courtesy: YouTube/Carolina Hurricanes