A wedding plan was a detailed plan for a wedding ceremony and reception that included the budget, venue, guest list, and more.

In 2261, Trelane posed as an Andorian wedding planner on Starbase 1, and used his powers to make the crew of the USS Enterprise believe that Spock and Christine Chapel were getting married. His father, who just happened to be Q, stopped him before he could do any serious damage. (SNW: "Wedding Bell Blues")

In 2268, Elaan said to Captain James T. Kirk, "Kryton was of a noble family. He loved me and wanted to marry me. He was furious when he heard of the announcement of the wedding plans." (TOS: "Elaan of Troyius"