Having flown to Belfast from the United States, Wilder will be ringside for the fight, before potentially defending his title against Fury - providing the Brit defeats Pianeta.
Tyson Fury fights Francesco Pianeta on Saturday night as he continues his comeback on the heavyweight scene. It's expected he'll face Fury in November.
So, it could be real or could not be. but one thing's for sure, it's a hell of a lot of fun.
Following the weigh-ins, Fury and Wilder engaged in a shouting match in the hotel lobby.
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The Bronze Bomber then told BBC Sport the fight with the Gypsy King, 'definitely will happen'.
Earlier today we brought you a video showing a heated exchange between Wilder and Tyson Fury's dad ahead of the Manchester-native's showdown with Francesco Pianeta tomorrow night.
Wilder, the WBC heavyweight champion, stormed into the room as Fury was being weighed Friday and shouted, "Bomb squad!"
The unbeaten 32-year-old was shouting his trademark "BombZquad" war cry at the weigh-in, which John Fury took exception to. Paddy Barnes' fight against WBC flyweight champion Cristofer Rosales will open proceedings, followed by Fury.
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Frampton weighed in at 126lbs, with Jackson at 124lbs 12oz.
It is routine for the main-event fighters to appear among the last at a weigh-in, but on this occasion they were instead first, contributing to the belief that Frampton had struggled to make weight.
It looked for a while like Wilder might finally fight Anthony Joshua (21-0, 20 KOs) in a heavyweight unification bout, but those plans fell through.
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