The following guidelines will be helpful for planning your LDS Temple bridal attire (from “General Handbook: Serving in The Church of Jesus Christ of Latter-day Saints,” 27. Temple Ordinances for the Living, 220.127.116.11)
Appropriate Clothing for a Temple Marriage or Sealing
Bride’s Dress. A bride’s dress worn in the temple should be white, modest in design and fabric, and free of elaborate ornamentation. It also should cover the temple garment. Sheer fabric should be lined.
To be consistent with other dresses worn in the temple, a bride’s dress should have long sleeves or three-quarter sleeves. Dresses should not have a train unless it can be pinned up or removed for the sealing ceremony.
The temple can provide a dress if needed or desired.
Groom’s Clothing. The groom wears normal temple clothing during the marriage or sealing ceremony (see 38.5.1 and 38.5.2). He may wear formal clothing outside the temple for photographs after the ceremony.
Guests’ Clothing. Those who attend a marriage or sealing ceremony should wear clothing similar to what they would wear to a sacrament meeting. Guests should not dress in white unless the sealing room must be entered through the celestial room. Members who come to a sealing directly from an endowment session may wear ceremonial temple clothing.
The couple should share this information with guests well before the marriage or sealing.
Flowers. The couple and their guests should not wear flowers during the marriage or sealing ceremony. Flowers may be worn outside the temple for photographs after the ceremony. The couple should share this information with guests well before the marriage or sealing.