Three decades after masterminding John Kennedy Jr. and Carolyn Bessette's under-the-radar nuptials, Rosemarie Terenzio has a playbook — and some pointed advice — for Taylor Swift and Travis Kelce.

Taylor Swift and Travis Kelce are set to marry on July 3 at Madison Square Garden, hosting an estimated 1,100 to 1,200 guests. | Hollywood

The couple had announced their engagement last September