4:45 PM PT -- We're still more than 24 hours away from the fight ... but Conor McGregor fans are already taking over Las Vegas -- screaming his name and raging on the escalators at Park MGM!!!
Ya gotta watch the clip ... McGregor fans -- some clearly pretty lubed up already -- are going insane, with one guy yelling at our camera, "Let's f**king go, Conor!!!"
Here it is ... Conor McGregor and Donald "Cowboy" Cerrone stripping down and weighing in for their main event fight at UFC 246 -- and good news, they both made weight!