'So generous': Chris Hemsworth donates $1 million to Australia bushfires

Chris Hemsworth has pledged a whopping $1 million donation to help fight the bushfires raging across his home country of Australia.

The Thor: Ragnarok star announced the pledge on Instagram, asking his nearly 39 million followers to also give where they could.

"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," Hemsworth captioned his video message.

"Hopefully you guys can chip in too. Every penny counts so whatever you can muster up is greatly appreciated.

Hemsworth thanked everyone who had donated so far, but said he didn't think the worst was over yet.

"As you're well aware the bushfires in Australia have caused massive devastation," Hemsworth addressed the camera.

"They're continuing to burn with warmer weather on its way. We're still in the thick of it here with plenty of challenging times ahead and still to come."

The Byron Bay local has been praised for digging into his deep pockets, with fellow action star Jason Momoa calling the act "so generous".

"Beautiful man mahalo nui," Momoa added.

Meanwhile, Red Cross Australia chimed in to thank Hemsworth, saying they were "blown away" by his support.

Other celebrities who have given generously to help fight the fires include Pink, Nicole Kidman and husband Keith Urban, and Ellen DeGeneres.