ABC News’ Mary Bruce ( @marykbruce ) reports:

Actress Daryl Hannah has been arrested, again, for protesting for an environmental cause. This time, Hannah was taken into police custody outside the White House during a protest urging President Obama to reject the Keystone XL tar sands pipeline, which would run from Canada to the Gulf Coast.

Daryl Hannah led a sit-in in front of the white house on a proposed oil pipeline and some people were arrested.

“We want to be free from our dependence on foreign oil and fossil fuels. If Obama approves of this Keystone XL pipeline… it would be a disaster. These pipelines, it’s not ‘if’ it’s going to spill, it’s ‘when’ it’s going to spill,” Hannah told ABC moments before her arrest. “We cannot risk these precious resources and we cannot shackle ourselves to this type of destructive energy future when we have solutions available to us. We have American-made, American-grown, clean safe energy.”

Hannah was arrested along with roughly 100 other protestors who sat on the sidewalk in front of 1600 Pennsylvania Ave. today and refused repeated requests to move, violating the White House demonstration rules.

Today’s protest was organized by the group Tar Sands Action, which claims the pipeline will pump 900,000 barrels a day of “the world’s dirtiest oil” from Alberta, Canada to refineries in Texas. The crowd outside the White House chanted “keep the tar sands in the soil, we don’t need your dirty oil,” as members of their group were hauled off by police.

Hannah and others claim the president is falling prey to special interests and the power of oil and gas lobbyists. “There are some powerful forces that want things to continue… to go their way and they’re the ones that have the loudest voices,” Hannah said. “If [President Obama] doesn’t do right by the American citizens, he will not be back in this office again.”

The actress, known for her roles in “Splash” and “Wall Street,” is an avid environmental activist and has been arrested several times in the past for issues ranging from coal mining to urban gardens.