Did we say hottest green celeb? Brad Pitt made headlines for his green project in New Orleans' devastated Lower 9th Ward, designed to create affordable and energy-efficient homes for the rebuilding city.

The Wedding Crashers star is comitted to making green sexy through her website...you guessed it...GreenIsSexy.org. Why sexy? "Because being infomred is sexy. Being responsible is sexy. Being eco-friendly is sexy," according to the site.

The actor is green all over. He did play the Incredible Hulk, after all.  Ed had a lot of practice, showing his support for the environment by narrating hte TV-documentary "Strange Days on Planet Earth."

The girl who played it big being clueless is anything but when it comes to animal rights and environmental issues. "Everything you do in the name of the environment not only saves your health, it saves your soul."

The fictional movie star of Aquaman may live in the lap of excess on his hit show "Entourage" but he's got green roots in real life. The actor and his mother rebuilt an 1890's Brooklyn house with recycled blue-jean insulation.

Actress Cate Blanchett has racked up countless awards, but she also has a pretty impressive green resume as well. She's an avid doner to green organizations like Forest Gardians, she appeared in ads for Sydney's Earth Hour, she renovated her home to be eco-friendly, and she has plans to help green the Sydney Theater Company.

Kids already know how green Cameron is thanks to her role as Princess Fiona in the cartoon movie franchise Shrek. When she's not being animated the leggy starlet does her part by hosting "Trippin," an eco-themed MTV series.

Julia told Oprah once that she wanted a vehicle that "smells like french fries" and, thanks to her husband, she got it. Her hubby bought her a bio-diesel car after she worried that their kids would soon outgrow their hybrid Prius.