Everything changed on April 29, 2011 when Kate Middleton became the Duchess of Cambridge. The world’s fleeting fascination with the young Brit became an incessant obsession and this desire to follow her every move, buy the same outfits, and track her child-bearing hasn’t stopped since. In the four years that the 33-year-old has been married to Prince William, she’s traveled the world, performed a lot of charity work, worn a lot of designer ensembles, had a baby, and is now expecting her second. But, most importantly, been in love (hopefully—real life fairy tales have got to be true). With the Duchess about to give birth at any minute (waiting on pins and needles here!), we’re taking a break from #GreatKateWait part two to take a look back at the couple’s relationship. From college sweethearts to parents to heirs to the United Kingdom, here are their best—and most stylish—moments.