The actor, 33, pledged his support to the Standing Rock protests while also taking the time to apologize for once dressing up as a Native American.
“Standing with those who are fighting to protect their sacred land and water. #nodapl #waterislife,” he captioned an Instagram photo of himself dressed as Thor.
The actor went on to address the controversial costume he wore while attending a “Lone Rangers”-themed New Year’s party last year.
“I was stupidly unaware of the offence this may have caused and the sensitivity around this issue,” he wrote. “I sincerely and unreservedly apologise to all First Nations people for this thoughtless action.”
He continued: “I now appreciate that there is a great need for a deeper understanding of the complex and extensive issues facing indigenous communities. I hope that in highlighting my own ignorance I can help in some small way.”
Shailene Woodley, who was one of the first celebrities to stand up for the cause, retweeted Hemsworth’s post and thanked the actor for his support.
Hemsworth is the latest public personality to throw their support behind the Dakota Access Pipeline protests. Mark Ruffalo, Susan Sarandon, Nikki Reed, Leonardo DiCaprio, Jaden and Willow Smith, and more have also pledged their allegiance to the cause.
Ruffalo also took to social media to show his excitement to have a fellow Marvel superhero on his side.
Woodley, 24, was arrested on Oct. 10 while participating in a protest in Bismarck, North Dakota. The actress, who streamed her arrest via Facebook Live, was charged with criminal trespassing and engaging in a riot, and has pleaded not guilty.
On Thursday, Ruffalo appeared on CNN to explain why he’s involved with the protests.
“Ultimately, a lot of the work I do has to do with protecting water and that’s what these people are doing there. And so I was invited by some of the folks I know there to deliver a solar system to power the camp for the winter time.”
On Thursday, North Dakota authorities dressed in riot gear began removing roadblocks set up by protesters to outline a camp that they claim is located on tribal land, according to CNN.
Ruffalo also described the conditions on the ground, saying that while he did not personally witness any police abuse, he has seen signs of the violence.
“I didn’t witness any violence while I was there, but I witnessed and heard the stories from the young people who had witnessed and felt the violence,” he said.