Update 19/10. YesFest has been cancelled. More information here.

Although the debate around marriage equality has been unpleasant – and for some, very difficult – it has been heartening to see individuals and companies getting around the Yes campaign with creativity and vigour.

The latest event supporting "Yes" is a big one. Australian Marriage Equality, in partnership with M&C Saatchi, has just announced YesFest, a LiveAid-style benefit for marriage equality. The first line-up announcement includes Client Liaison, Flight Facilities (DJs), Heaps Gay DJs, Jack Colwell, Kirin J Callinan, Killing Heidi, KLP, Megan Washington, Nic Cester (Jet), Northeast Party House, The Preatures, Tkay Maidza, Touch Sensitive and special guest Jimmy Barnes.

“We were working on something proactively inside the agency about getting people to enrol for the August 24 cut-off to enrol. We realised there was much a bigger opportunity for the Yes campaign,” says Jonathan Seidler, who works at M&C Saatchi and is one of the executive producers of the campaign.

It's on in the week before votes are due back to the Australian Bureau of Statistics and is designed to encourage people to vote yes. “There are two parts – one is to galvanise young people to vote if they haven’t, and also to get them to come out in force. There’s a belief that young people are too lazy to get out there: slacktivism. We want to show that’s wrong," says Seidler.

The event will be hosted by TV personality Osher Günsberg. All profits will go to the Australian Marriage Equality campaign. The event is happening at Spotless Stadium at the Sydney Showgrounds, Homebush, on October 29 from 3pm. Seidler says a second line-up announcement is coming, which will be equally as big.

Tickets are $73.72 including handling fee, available from 12pm Friday October 6 here