Preparations began earlier in the week with unmarked trucks delivering a 40-inch mirrorball, tree structures with twinkle lights, and food.
Reports suggest potential performances by Tim McGraw and Stevie Nicks, with guests signing non-disclosure agreements and phones banned.
Swift previously discussed planning a large event on The Graham Norton Show, saying, "I know it's going to be fun to plan, because I think the only stressful weddings are the ones where you have a small amount [of guests]."
She added, "I'm not gonna do that."
The event requires over 130 police officers for crowd management.
NYPD Commissioner Jessica Tisch said, "The NYPD will of course have a detail in place, but I'm not going to go into more specifics at this time."
To address potential criticism over resource use, Swift and Kelce announced a $26 million donation to charities across the United States.
Observers await details after the ceremony.
Mackenzie remarked, "We will be desperate to see the dress, see how she wore her hair and if she goes with a signature red lip."
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He added, "I didn't think I cared, but now I'm thinking about it and I'm excited. This is how she gets you."
