he Official site of the Cayman IslandsDepartment of Tourism, World Wide.

Couples, including those arriving by cruise ship for their Cayman Islands wedding can marry the same day they arrive in the Cayman Islands. Just be sure to have the following: 1. a non-residents marriage license, and... 2. a letter from the authorized Marriage Officer who is to officiate. Applications for non-resident marriage licenses ($250 U.S.) and a list of licensed Marriage Officers can be obtained from the Passport and Corporate Services Office. On Cayman Brac and Little Cayman, this is provided by the District Commissioner's Office.