Australia's only current UFC champion, Alex Volkanovski, will return to the octagon on Sunday 26th September (AEST), when he defends his featherweight title against Brian Ortega.
Volkanovski hasn't fought since July last year, where he successfully defended his title against Max Holloway at UFC 251.
UFC 266 will take place on Sunday 26th September (AEST), which is of course Saturday night in the US.
The event will emanate live from T-Mobile Arena in Las Vegas, Nevada.
The pay-per-view portion of the show will begin at midday.
WHAT TIME IS UFC 266 IN AUSTRALIA?
UFC 266 will begin at midday AEST for the pay-per-view portion of the event.
The early prelims will begin at 8am and run for two hours, with the prelims to begin at 10am and run for two hours as well.
HOW TO WATCH OR STREAM UFC 266 IN AUSTRALIA
As with all UFC pay-per-view events, you can catch them live on Main Event for $54.95.
You can also watch the event live and in full on Kayo Sports.
Two title fights will headline with UFC 266 card, with Australia's Alex Volkanovski defending his strap against Brian Ortega, while women's flyweight stars Valentina Shevchenko and Lauren Murphy go head-to-head.
Nick Diaz will step inside the octagon for the first time since 2015, taking on former welterweight champion Robbie Lawler.
Here's the full card for UFC 266.
UFC Featherweight Title: Alex Volkanovski (c) vs Brian Ortega
UFC Women's Flyweight Title: Valentina Shevchenko (c) vs Lauren Murphy
Nick Diaz vs Robbie Lawler
Curtis Blaydes vs Jairzinho Rozenstruik
Jessica Andrade vs Cynthia Calvillo
Marlon Moraes vs Merab Dvalishvili
Dan Hooker vs Nasprat Haqparast
Shamil Abdurakhimov vs Chris Daukas
UFC 266 Early Prelim Card
Manon Fiorot vs Mayra Bueno Silva
Karl Roberson vs Nick Maximov
Matthew Semelsberger vs Martin Sano