Scientology and marriage, within the Church of Scientology, are discussed in the book The Background, Ministry, Ceremonies & Sermons of the Scientology Religion.
Scientology weddings do not require that both parties of the wedding be adherents of Scientology. Nor does the Church necessarily exclude material from weddings of other faiths in its own ceremonies. One source, J. Gordon Melton, has ascribed this to Scientology trying to mollify members of the wedding partners' families.
Scientology and marriage Wikipedia
Scientology wedding ceremonies are similar to wedding ceremonies used by many other religions. They typically include a bridal procession, best man, maid of honor, and the traditional seating of friends and family. The ceremony may include wedding customs used by other faiths. There are five versions of the ceremony: traditional, informal, single ring, double ring, and concise double ring. The Traditional ceremony includes:
The Church of Scientology has had a controversial history regarding LGBT issues and same-sex marriage. In recent years, the Church has publicly embraced the subject more so than in the past. In 2005, a spokesperson for the Church told the New York Daily News that the Church had "not taken an official position on gay marriage, and that members prefer not to talk about it." In 2008 the Church supported Prop 8 in California which banned same-sex marriages, even in counties where they had been performed before. In 2009, award-winning writer Paul Haggis quit the church due to its apparent stance on homosexuality.
Probably the most famous Scientology wedding was the one between Tom Cruise and Katie Holmes on Saturday, November 18, 2006. Cruise and Holmes announced their engagement in June 2005. Scientologist spokesperson Karen Pouw stated that as part of their nuptial vows, "they won't go to sleep at night without having repaired any upset they may have had during the day,".
In 2008, Louisa Hodkin and then fiancé Alessandro Calcioli were denied the right to marry in a Church of Scientology chapel in London due to a 1970 High Court ruling that said that “Scientology services were not ‘acts of worship.’" Hodkin initiated legal action, and after a five-year battle, in December 2013, five Supreme Court judges ruled that the church was “a place of meeting for religious worship.” In early 2014, Hodkin and Calcioli wed in the Scientology chapel in Blackfriars, London, and Hodkin expressed pride in the victory, which she felt put an end to inequality for people of all faiths.