Ask The Celebration Advisor:

For a Catholic wedding ceremony on Long Island, NY, in the wedding processional, what side of the aisle does the bride's father walk on when he escorts the bride down the aisle? I've gotten different answers to this question. Sheila

Wedding Expert Reply:

According to the Catholic Rites of Marriage, the procession should be as follows:

Lectors, and altar servers go first, followed by the priest, and then the bride and bridegroom.  Their parents and two witnesses may escort the bride and groom as dictated by local custom.

However, in the United States, the bride is usually escorted by her father with the bride on the left and the father on the right.  I suggest consulting with the priest who will be officiating the wedding ceremony.  Each parish may have its preferred wedding procession tradition.