Amid the Taylor-mania outside New York's Madison Square Garden, the first real clue of a major wedding bombshell could almost have been lost in the crowd.

The wedding festivities will reportedly begin Thursday night with a 100-person rehearsal dinner at MSG’s theater

Tantalizing details about the worst-kept secret in showbusiness have begun to leak out as Taylor Swift and Travis Kelce prepare to tie the knot.

All signs point to a massive celebration on Friday.

A rehearsal dinner. A huge party. Hundreds of cops. And, perhaps, a big twist.