Undefeated champ Khabib stepped on the scales first and weighed bang on the 155 lbs limit at in Las Vegas, with challenger McGregor went second, although significantly later, eventually scaling 154.5 lbs.

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Predictably, Dubliner McGregor forced an expectant crowd to wait, in-keeping with his infamous suspenseful, late-arrival technique. After his weight was announced, the packed room erupted into roars and applause for the former featherweight and lightweight champion, there were even rumors the electricity dipped and wifi connections failed as journalists scrambled to report the news. 

McGregor left a lot quicker than he took to arrive, spending a total of just 20 seconds on the stage before exiting. 

On Thursday, McGregor poked fun at Khabib's previous struggles with making weight at the press conference. The latter exited early from the media event to continue his cutting process, with McGregor absent due to his notorious tardiness. 

When McGregor did arrive, he wasted no further time saying the Dagestan native should be put in a sauna and "cook him like the chicken jaw rat that he is!"

Khabib was dramatically rushed to hospital when trying to make weight ahead of a slated fight with Tony Ferguson in 2017, thus putting paid to that bout. 

READ MORE: 'Well this is awkward...': Khabib walks out as Conor late AGAIN for presser in Las Vegas (VIDEO)

However, there were no problems this time round for the Russian, who lays his belt and perfect record on the line against McGregor, who is making his return to the octagon after a two year absence in the biggest fight in the world of professional MMA.