Froch produced an astonishing display in Nottingham to knock out Bute in five rounds and become a world champion for the third time - and hand Bute a first ever defeat.
However, before travelling to face Froch in England, Canadian-based Romanian Bute had written into the contract that he would be entitled to a rematch in his own backyard if he lost his belt.
That clause has since been triggered ensuring the two fighters will meet again.
Before fighting Bute, Froch confirmed he would have a tune-up fight in Nottingham next November although his opponent for that bout has yet to be confirmed.
"Froch vs. Bute has already gone down as one of the greatest nights in British boxing history," said Froch's promoter Barry Hearn.
"It generated record television audiences and a sold-out arena where fans were treated to what many respected pundits and fighters have described as one of the best atmospheres ever felt in a British fight.
"Of course, like any fighter Lucian is keen to avenge this defeat and as per our agreement has the opportunity to try to make that happen.
"Froch vs. Bute II in Montreal is a massive event and I'm sure that impressive victories for both men later this year will add further fuel to the fire."