Jimmy Barnes, the John Butler Trio and Josh Pyke are among several artists to donate songs to an album in support of the Australian marriage equality campaign.
The album, titled #SayYesToLove Vol. 1, was coordinated by advocacy group Australian Marriage Equality (AME).
It will feature a mixture of pre-existing tracks, new cover tracks, and brand-new songs. Other artists to feature include The Basics, Katie Noonan, The Cat Empire and Wes Carr.
"We've got a really great collection of well-known artists and also incredible up-and-coming artists as well," executive producer Michael McGlynn told BuzzFeed News.
All proceeds from the album, which will be available via iTunes this Friday, will go towards AME's campaign.
Former Cold Chisel frontman Jimmy Barnes has lent his support to the campaign, saying marriage equality is about "basic human rights".
"No one has the right to tell someone who they can love, or how they can express their love," Barnes said.
"It is very hard to find love in this world, and we don't all feel the same way about what love is. But it is the most important thing that I have in my life and I support people who want to share their lives together anyway they want to do it."
So many Australian artists were keen to be involved that there will be more albums to come, said McGlynn.
"We've got a whole bunch of really amazing artists for the second one already," he told BuzzFeed News.
"It's more than just one album. This is a movement by the Australian music industry."
Ivan Hinton-Teoh from Australian Marriage Equality said the campaign was a "new and innovative way" to support same-sex marriage in Australia.
"I hope it inspires more to find their voice to champion for equality," he said.
A cross-party bill to legislate same-sex marriage, co-sponsored by MPs from the government, the Labor party, the Greens and independents, is expected to be introduced to the parliament in August.
Polls have indicated that approximately 70% of Australians support marriage reform.