In a traditional wedding of two members of The Church of Jesus Christ of Latter-day Saints (also referred to as 'LDS' or 'Mormon'), a simple marriage ceremony takes place in an LDS Temple. Typically, immediate family members of the bride and groom join in this sacred part of the day. Pictures are taken outside of the temple after the ceremony where some others may also join.
Later that day an open house or reception is customarily held in their honor. The open house is a celebration where a wider group of friends and family gather. This is also the time that a few of the more common wedding activities take place -- the bride and groom cut the wedding cake, the bride throws the bouquet, guests mingle and enjoy hors d'oeuvres, etc.
The family is a focal point in the LDS faith. Just like in any marriage ceremony, certain vows are made. In an LDS marriage performed in the temple, couples are promised the blessings of marriage in this life and in the life to come so long as they are faithful to the covenants they make.
According to Elder Russell M. Nelson, an LDS church leader, "The noblest yearning of the human heart is for a marriage that can endure beyond death. Fidelity to a temple marriage does that. It allows families to be together forever. This goal is glorious. All Church activities, advancements, quorums, and classes are means to the end of an exalted family."