The Sydney Gay and Lesbian Mardi Gras will bid to host WorldPride 2023 following a commitment of support from the NSW government.
The organisation on Thursday received a letter from Premier Gladys Berejiklian confirming the government's support and $200,000 to help develop the bid.
WorldPride is a biennial event which includes parades, festivals and other cultural activities.
It was first hosted in Rome in 2000 and will take place in New York in 2019 and Copenhagen in 2021.
Sydney Mardi Gras is a member of InterPride, the international association of pride organisations which runs WorldPride.
The mega festival has never been hosted in the southern hemisphere.
Australia's will propose hosting WorldPride within the existing two-week footprint of the annual Sydney Mardi Gras festival.
The first week would be dedicated to Mardi Gras and the second week dedicated to WorldPride - including a human rights conference.
"There is no other parade in the world like it (Sydney Mardi Gras) for the LGBTI community," co-chair Kate Wickett told AAP Friday.
"It's highly curated, really creative and we get a really good depth of diversity from across the community.
"(WorldPride) would be really a great opportunity to expand and showcase that to the world."
Sydney's bid will be presented at the InterPride annual general meeting in Copenhagen in October.
