Lightning Lad & Saturn Girl got married in Legion of Super-Heroes Vol. 3 #45 and we got to see what the wedding attire looked like in the 30th century. Garth & Imra look great (I like that the groom's also showing cleavage), but would it kill the guests to dress up for the occasion? Sheesh.
Later on the newlyweds go on their honeymoon which also gave us a peak of what swimsuits look like in the distant future.