When the wedding party is gathered by the altar, the bride and groom exchange vows.

当婚礼一行人聚集到教堂的祭坛前时，新娘和新郎互相表达誓言。

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Noah Fulmor and Erin Finnegan will exchange vows on a specially-adapted plane, which performs 15 swoops from 11km to 7.3km to allow 30 seconds of weightlessness.

届时，新郎诺赫和新娘艾琳将乘坐一架经特殊改装的飞机飞到11公里高空，再作15次俯冲到7.3公里高度，从而感受30秒失重状态，并在此间宣读结婚誓言。

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A bride and groom share a tender moment as they exchange vows by a river.

新郎和新娘在河边交换誓言的温馨时刻。

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Gretna remains a popular location to exchange vows as more than one in six marriages in Scotland took place there last year.

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Following their exchange of vows, the couple's main titles became the Duke and Duchess of Cambridge.

BBC: Royal wedding: Thousands in Northern Ireland celebrate

But TV audiences did not witness an exchange of vows until 21 years later, when Prince Charles married Lady Diana Spencer.

BBC: Royal weddings: A brief history