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'Django Unchained' Press Conference

SEOUL, SOUTH KOREA - MARCH 07: Actor Leonardo DiCaprio attends the 'Django Unchained' Press Conference at the Ritz Carlton Hotel on March 7, 2013 in Seoul, South Korea. Leonardo DiCaprio is visiting South Korea to promote his recent film 'Django Unchained' which will be released on March 21 in South Korea. (Photo by Han Myung-Gu/WireImage)

Earth Day: Stars and Their Environmental Causes

We're celebrating Earth Day by taking a look at stars who are taking an active role in protecting our planet with their charitable work.