The event will include the bride's dress fitting, planning for the big day, bachelor and bachelorette parties and, of course, the ceremony. ABC says the guest list includes former "Bachelor" and "Bachelorette" couples and participants.
No word yet if Mesnick's former fianceé Melissa Rycroft will be invited to the extravagant affair. Mesnick broke off his engagement with Rycroft for a chance with Malaney on "The Bachelor: After the Final Rose" special.
Melissa moved on and tied the knot with Tye Strickland in December.
In 2002, "The Bachelorette's" Trista Rehn and Ryan Sutter wed in ceremony that aired live on ABC.