The music that accompanies the wedding party as they enter the wedding ceremony is the processional.
Preferences for the music selection differ. Some of the more traditional/popular choices for a wedding processional include:
- Wagner's Bridal Chorus (“Here Comes the Bride”)
Merriam-Webster Online Dictionaryprocessional (noun)
a book containing material for a - procession
a musical composition (as a hymn) designed for a procession
a ceremonial procession
of, relating to, or moving in a - procession