Hebert and fiance J.P. Rosenbaum have signed a deal with ABC to film their marriage ceremony.
"The Bachelorette: Ashley and J.P.'s Wedding" will air in December. It will include everything from Hebert's dress fitting and wedding planning to the bachelor and bachelorette parties.
Hebert competed for Brad Womack's affections on the 15th season of "The Bachelor." She was then chosen to be the next "Bachelorette." The dating reality show aired last year.
Hebert, 28, is a dentist in Philadelphia. Rosenbaum, 35, works in construction in New York.
Filming is under way for the next season of "The Bachelor," with 24 women competing for the affection of Dallas businessman Sean Lowe. The new season will premiere in January.