The Duchess of Cambridge & Prince William’s Cutest Moments

Four years ago today, Kate Middleton and Prince William tied the knot at Westminster Abbey in London—an unforgettable fashion moment when the bride emerged wearing a custom Alexander McQueen lace gown. In celebration of their wedding anniversary, here are the cutest moments of their relationship, from their college graduation straight through their engagement, wedding and the birth of little Prince George.

The young couple looking ecstatic on the day they graduated from University of St. Andrews in 2005.

Photos: Getty Images

The day they announced their engagement in 2010, Kate's famous blue dress from Issa immediately sold-out—putting the British fashion house on the map.

On April 29, 2011, Prince William drove his lovely new wife, Princess Catherine, Duchess of Cambridge, down The Mall in London in his dad's vintage Aston Martin.

At the 2012 Olympics hosted in London, Kate and William were among the fans celebrating when Great Britain won the gold medal in track cycling.

We're loving this relaxed family photo taken after the birth of their first baby, Prince George Alexander Louis of Cambridge—who was born in July of 2013.

This photo of the royal family was taken at the Sensational Butterflies exhibition at the Natural History Museum in London just before Prince George turned 1 in July of 2014.

In December of 2014, Kate stepped out with a tiny baby bump looking incredibly glam at an event for St. Andrews at The Metropolitan Museum of Art in NYC. Her baby is due any day!