Daryl Hannah has been arrested in front of the White House while opposing a planned oil pipeline from Canada to the US Gulf Coast.
The sit-in involved dozens protesting against the pipeline. It would go through Montana, South Dakota, Nebraska, Kansas, Oklahoma and Texas to refineries in Houston and Port Arthur, Texas.
Before she was arrested, with other environmental protesters, Daryl told WRC-TV the protesters want to be free from the "death and destruction" that fossil fuels cause. The group is calling for clean energy instead.
She sat down on the pavement near the White House and refused orders from US Park Police to move.
She has been arrested for environmental causes in the past.