There are many settings of the Alleluia.  I've listed the more popular ones.  Weddings during Lent are rare and not encouraged, but if your wedding is during Lent, your choices are more limited and you should use the Lenten Gospel Acclamation normally used at that parish.

Celtic Alleluia
Alleluia from "Sing Praise and Thanksgiving"
Alleluia (Chant Mode VI)