UFC 189 takes place on Saturday night with a main fight between Chad Mendes and Conor McGregor set to take the Octagon by storm as they fight it out for the Interim Featherweight Title. The Early Prelims can be watched via the UFC Fight Pass from 7 p.m. ET, where as the Main Prelims can be watched on Fox Sports 1 from 8 p.m. ET. The main card features five big bouts and starts at 10 p.m. ET, and can be watched on UFC PPV or online through live stream via the link provided below. A UFC 189 full fight card and schedule can also be seen below.

As well as the main fight between Chad Mendes and Conor McGregor, UFC 189 also features a co-main event as Robbie Lawler fights Rory MacDonald for the Welterweight title.

Tonight's UFC 189 festivities come from the MGM Grand Garden Arena in Las Vegas, Nevada, and in fact was originally billed as a massive battle between two of the most ruthless fighters in MMA - McGregor and Jose Aldo.

However, that major fight will have to live to see another day after an injury put to bed that match up. Instead Chad Mendes and Conor McGregor will step into the Octagon for the Featherweight title.

McGregor is well known as a powerful striker, and in his past five appearances he has managed four technical knock out wins. If he can defeat Mendes today then he will step right up among the featherweight elite in MMA, and it would only be a matter of time before he then steps up to finally face Jose Aldo.

However, as much as McGregor has it all to gain today, he also has it all to lose, as if Mendes can manage to claim the win today then it would distinctly water down the McGregor reputation, transforming him from potential UFC superstar to just another fighter who talks the talk but struggles to walk the walk.

Today's big UFC 189 event can be watched on UFC PPV, with the Early Prelims available to watch via the UFC Fight Pass from 7 p.m. ET, and the Main Prelims available to be watched on Fox Sports 1 from 8 p.m. ET. The main card starts at 10 p.m. ET and can be watched on UFC PPV or online through live stream by clicking here.

A full UFC 189 fight card can be seen below:

UFC 189 PPV Main Event:
145 lbs.: Chad Mendes vs. Conor McGregor for the interim featherweight championship

UFC 189 PPV Co-Main Event:
170 lbs.: UFC Welterweight Champion Robbie Lawler vs. Rory MacDonald

UFC 189 PPV Main Card (10 p.m. ET):
145 lbs.: Dennis Bermudez vs. Jeremy Stephens
170 lbs.: Gunnar Nelson vs. Brandon Thatch
135 lbs.: Thomas Almeida vs. Brad Pickett

UFC 189 FOX Sports 1 "Prelims" (8 p.m. ET):
170 lbs.: Matt Brown vs. Tim Means
170 lbs.: John Howard vs. Cathal Pendred
170 lbs.: Alex Garcia vs. Mike Swick
135 lbs.: Henry Briones vs. Cody Garbrandt

UFC 189 Fight Pass "Prelims" (7 p.m. ET):
125 lbs.: Neil Seery vs. Louis Smolka
155 lbs.: Yosdenis Cedeno vs. Cody Pfister