The rumours are all true — Cher has today been confirmed as the headlining act for the 2018 Sydney Gay & Lesbian Mardi Gras.

It was heavily rumoured late last year that the US music legend would be heading Down Under for the event going down on 3 March, but organisers have officially confirmed the news today.

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"Cher has established herself as an influential, hard-hitting voice in global politics, and throughout her career has been at the forefront of LGBTQI campaigns and numerous charities," Mardi Gras CEO, Terese Casu, said.

"Cher represents the same unapologetic and fearless freedom that makes the LGBTQI community so enduring and strong—positioning herself as a true gay icon."

Cher will be joined at the event's 40th edition by a string of Australian DJ's, including Alex Taylor, Annabelle Gasper, Ben Drayton, Dan Murphy and Dan Slater.

Limited tickets to the 2018 Sydney Gay & Lesbian Mardi Gras go on sale from 10am on Wednesday 17 January; click here for more details.