Lindsay, 25, works for the Department of Homeland Security. Josh, 28, works for the U.S. Capitol Police. They live in Arlington.

The Main Event: A black-tie event Oct. 20 in Boca Raton, Fla.

How They Met: They were both George Washington University students, but it took JDate to introduce them.

First Date: Dinner in Georgetown, then a movie.

First Kiss: One on the cheek after Date 1, on her way back to her dorm.

How He Proposed: He wrote “Will you marry me?” in chocolate on top of rainbow marzipan cookies.

Their Song: “The Story,” by Brandi Carlile. “This one felt right,” Lindsay says. “It spoke to us.”

Most Stupid Fight: The “correct” ways to load the dishwasher and replace a toilet paper roll.

When They Knew: “When she got me to quit smoking.” “When I left my study abroad program a semester early to be with him.”