only once in a generation. the future king of england set to transform a young woman into royalty by taking her hand and pledging his love. >> are you excited about the day? >> very, very excited. i love it all. i really do. >> kate comes from a line of coal miners. her mother, a former flight attendant. and now she will become the first commoner in 350 years to marry a man who would be king. the crowning glory in a relationship that has unfolded before the world. >> we're looking forward to spending the rest of our times and the rest of our lives together. >> today, we'll trace the path of this royal romance. how william and kate met. how they fell in love. how the prince proposed. >> a true romantic. >> and, of course, what comes next. >> we want a family. we'll have to start thinking about that.