BISMARCK, N.D. — Actress Shailene Woodley has joined a group of protesters in North Dakota demonstrating against the $3.8 billion Dakota Access Pipeline.

The Bismarck Tribune reports ( ) the star of the “Divergent” movie series joined more than 200 protesters Thursday at a “spirit camp” established by the Standing Rock Sioux at the confluence of the Cannonball and Missouri rivers.

The pipeline would start in North Dakota and pass through South Dakota and Iowa before ending in Illinois. Construction of the pipeline began this week just north of the Standing Rock Sioux reservation.

Authorities say a dozen protesters were arrested Thursday evening were for disorderly conduct or criminal trespass. Woodley was not among those arrested.