Hemsworth and John join a growing list of celebrities who have pledged to donate toward relief efforts, including Nicole Kidman, Pink and Keith Urban.
"I am totally devastated watching what is happening in Australia right now with the horrific bushfires," Pink wrote in a recent social media post. “I am pledging a donation of $500,000 directly to the local fire services that are battling so hard on the frontlines. My heart goes out to our friends and family in Oz.”
Metallica announced a donation Tuesday night of $750,000 to a firefighting agency and emergency services agency in Victoria.
» Dozens dead, thousands evacuating as Australian wildfires worsen
An emotional Rose Byrne, who is Australian, spoke about the crisis and the relief efforts on Tuesday night at the New York premiere of her movie “Like a Boss.”
“Really what people need is just donations because it's all volunteer based, the firefighters and all the rural services and the wildlife services trying to rescue the animals,” she told the Associated Press.
She added: “It's devastating. It's such a beautiful country. There's always drought but this is the hottest year on record and they need rain but a lot of rain, not just a little bit which is what's happening now. They need like a downpour, downpour and it's just getting hotter and it's getting more and more out of control. It's a climate crisis is what it is.”
At the Golden Globes on Sunday, Phoebe Waller-Bridge said she would auction off her Globe outfit and have the proceeds go to firefighter relief.
Russell Crowe wasn't at the Globes to accept his trophy for best actor in a limited series or TV movie for playing former Fox CEO Roger Ailes in the Showtime miniseries “The Loudest Voice." Instead, the actor was in Australia trying to protect his home from the wildfires, sending a speech that Jennifer Aniston read.
"Make no mistake, the tragedy unfolding in Australia is climate change-based,” Crowe’s statement said. “We need to act based on science, move our global workforce to renewable energy and respect our planet for the unique and amazing place it is. That way, we all have a future.”
» 'Apocalyptic conditions' caused by wildfires trap 4,000 in Australian waterfront town