Republican presidential candidate Donald Trump speaks to guests and supporters during a rally. Scott Olson/Getty Images The Republican convention that will likely nominate Donald Trump as the party's presidential candidate is still in the planning stages — and it seems as unpredictable as the candidate himself, according to a Friday report in The New York Times.

Two unnamed aides told the newspaper that Trump didn't even know the convention had to be held in Cleveland.

The decision to hold the convention in the Ohio city had been made two years ago.

Cleveland officials spent months on the city's bid to host the convention, and Republican National Committee Chairman Reince Priebus announced the city's selection in 2014.

Cleveland's Democratic mayor, Frank Jackson, got behind the bid, and local fundraisers have raised millions of dollars to cover the cost of hosting, according to The Plain Dealer.

Trump had promised a convention that's more "fun" and less "boring" than in previous election cycles, but now it seems that he might try to keep things somewhat conventional after all. (Although he did suggest shooting off fireworks inside the Quicken Loans Arena, where the convention will be held. The Times noted that idea proved to be "unworkable.")

"There's a lot of sameness in conventions," Trump told the Times. "At the same time you don't necessarily want to reinvent the wheel. You don't want to make it so different that it’s no longer a convention."

Some Republicans who haven't come out in support of Trump have noted their reluctance to speak at the convention, so the committee hasn't nailed down a lineup of speakers yet.

Trump denied not knowing that the Republican convention had to be held in Cleveland, and said there's a long list of speakers lined up for the convention: