The Thor star, who grew up in Melbourne, announced his pledge via an Instagram video earlier today.
"I'm going to put forward a million dollars, and I was hoping that all of you could contribute in any way, shape or form," he said. "Every dollar counts. That money goes directly to the firefighters, the people on the frontlines, the people who have suffered, the communities that have taken a hit and are in desperate need of our support."
He also shared links to organizations contributing to the relief and recovery effort, like the Australian Red Cross, the World Wildlife Fund and the New South Wales Rural Fire Service.
Watch Hemsworth's video below.
Hi everyone. Like you, I want to support the fight against the bushfires here in Australia. My family and I are contributing a million dollars. Hopefully you guys can chip in too. Every penny counts so whatever you can muster up is greatly appreciated. In my bio I've added links to support the fire fighters, organisations and charities who are working flat out to provide support and relief during this devastating and challenging time. Beyond appreciative to everyone around the world for their well wishes and donations. It really does make a difference, so dig deep! Love ya.