People from all nations and from all generations are called unto the marriage supper of the Lamb¹ to be held at New Jerusalem (Zion) in Missouri during Christ's first appearance of the Second Coming.² However, attendees must be worthy³ of celestial glory to attend.⁴ That is, they must be baptized members of The Church of Jesus Christ of Latter-day Saints and they must be obedient to their baptismal covenants.⁵ Several ancient prophecies take about this event⁶ and Christ gave three parables that explain the identities of people qualified to attend the marriage supper. The three parables include the Marriage Supper in Matthew 22,⁷ the Wedding Guests in Luke 14,⁸ and the Ten Virgins in Matthew 25.⁹

These parables indicate that people attending the marriage supper are not a homogenous group. In fact, three different classes of people will attend the feast.¹⁰ Their status corresponds to the three degrees of glory within the celestial kingdom.¹¹ First, there will be those adorned as a bride¹² because they qualify for exaltation as members of the Church of the Firstborn in the highest degree of celestial glory.¹³ Second, there will be bridesmaids and groomsmen¹⁴ who are ministering angels in the celestial kingdom.¹⁵ They are not exaltation-worthy because they are not sealed in the new and everlasting covenant of marriage¹⁶ after first having that opportunity.¹⁷ The third group consists of the remaining guests that are worthy of celestial glory but do not qualify to be a bride or a wedding attendant.¹⁸ In short, the marriage supper for the bridegroom who is Christ, will include (1) his bride, (2) the wedding attendants, and (3) all other celestial-worthy wedding guests.

The scriptures frequently refer to all three groups of celestial-worthy saints as the general assembly and Church of the Firstborn collectively.¹⁹ Some scholars use both terms synonymously to identify all three groups of celestial-worthy saints.²⁰ To be more precise, however, the Church of the Firstborn identifies exaltation-worthy saints of the celestial kingdom represented by the bride of Christ. The bride of exaltation-worthy saints is a distinct subset‒or an inner circle of saints‒within the general assembly that more broadly includes all celestial-worthy attendants and guests.²¹ In other words, exaltation-worthy saints in the Church of the Firstborn are one smaller part of the larger general assembly of all celestial saints. Thus, not all celestial-worthy saints of the general assembly are exaltation-worthy members of the Church of the Firstborn, but all exaltation-worthy saints in the Church of the Firstborn are part of the general assembly.

In Revelation 14:1, and elsewhere, John identifies exalted saints from the Church of the Firstborn as the 144,000 Servants who stand with Christ on mount Zion as his bride.²² This imagery depicts the symbolic setting of the marriage of Christ to his bride in heaven on mount Zion after the morning of the first resurrection resumes at the end of the Second Woe, after Modern Babylon is destroyed during the Third Woe, and just before Christ's first appearance of the Second Coming to New Jerusalem for the wedding feast.²³ Since celestial attendants and guests are not the bride of Christ, they will not be raised up, quickened, or resurrected during the morning of the first resurrection to stand with Christ on mount Zion for the marriage ceremony.²⁴ The attendants and guests then living will remain on earth as mortals to await the coming of the bridegroom after his marriage in heaven in the likeness of the ten virgins who wait for the coming of the bridegroom. The attendants and guests do not descend with Christ at his Second Coming.

If the celestial attendants and guests are already deceased at the time of the Second Coming, their disembodied spirits will remain in celestial paradise until the time of the marriage supper. The marriage supper will begin on earth at New Jerusalem after Christ descends with his bride (the Church of the Firstborn) from mount Zion. This will occur as Christ makes his first appearance of the Second Coming. Wedding attendants and guests who are members of the general assembly‒including those who are disembodied spirits‒will separately descend from celestial paradise as Joseph Smith clarified in the Joseph Smith Translation of Genesis 9:23, saying, "the general assembly of the church of the firstborn shall come down out of heaven, and possess the earth."²⁵

Resurrected members of the Church of the Firstborn, disembodied spirits of the general assembly, and celestial-worthy mortals will all attend the marriage supper. In addition, the Lost Ten Tribes will attend in their translated condition.²⁶ They will make their grand entry from the north countries (heaven) after they first attend the gathering of saints at Adam-ondi-Ahman 3½ years before the marriage supper.²⁷ They will have a protective presence on earth when New Jerusalem is constructed in Missouri during the Great Tribulation.²⁸ They will then be taken up at the end of the Second Woe to stand with Christ on heavenly mount Zion as recorded in Revelation 14:1. After their marriage to the Lamb and their attendance at the wedding feast in New Jerusalem, the Lost Ten Tribes will remain on earth in their translated (terrestrial) condition and they will occupy the lands of their promised inheritance. As millennial mortals, they will have children and the whole house of Israel will populate the earth for 1000 years. The translated people from the Lost Ten Tribes who descend with Christ at the Second cannot be resurrected until they receive their temple ordinances at the hand of Ephraim in the same temple they will help construct in Jackson County, Missouri.²⁹

Many celestial-worthy people will attend the marriage supper, but their number will be few when compared to the world at large. The parable of the ten virgins indicates that half of all members of The Church of Jesus Christ of Latter-day Saints will not qualify to attend because they don't keep the commandments.³⁰ In addition, very few people in this world will even accept the invitation to come unto Christ through baptism,³¹ after having the opportunity to do so in this life³² or in the spirit world.³³ According to the parable of the wedding guests, when the rich, learned, wise, and noble refuse the invitation to be baptized,³⁴ the poor, lame, blind, and deaf are invited to attend the marriage supper in their place because they are meek of the earth who accept baptism and become members of the Church.³⁵