Religious Blessing at a Non-religious Wedding

My daughter has decided to have a non-catholic/non-religious wedding. There does not seem to be any possibility of changing her mind mostly due to her fiance. Needless to say this has caused some "discomfort" within my family. While I know that the wedding can not be blessed by the Catholic Church, is there any type of a Catholic blessing or prayer that I can give at the wedding or at the wedding reception? I am at a loss as to what else I can do.