It is very common to see wedding and marriages in dreams. Quite often they have no meaning as it is merely an extension of the day time activity like attending a wedding or seeing something related to marriage on television etc. But naturally dreaming of attending a wedding has meaning and is of great significance.
Dreaming of attending a wedding is a positive dream and it suggests happiness, hope and better feature. It also suggests acceptance and honor.
Unmarried people seeing the dream of attending a marriage is an indication of a new relationship or early marriage.
Married people seeing the dream is an indication of happy occasion in life or get together.
A dream to have a meaning it should happen naturally. If the dream is because of some event during the day then it has no importance and meaning.