Happily Ever After! Inside Elizabeth Smart's Hawaiian Wedding

The child-abuse advocate says 'I do' to beau Matthew Gilmour in a picture-perfect Feb. 18 ceremony

HORSE PLAY

On the eve of their Feb. 18 Hawaiian nuptials, Elizabeth Smart and fiancé Matthew Gilmour enjoy a horseback ride – a first for the Scottish groom! – along the Hawaiian shore. "We're just thrilled," her father, Ed Smart, told PEOPLE, of the couple's engagement. "We're looking forward to her moving on to this next stage and leading a very happy life."