Step into the season with Karen Millen's collection of autumn wedding guest dresses. From rich jewel tones to warm earthy shades, our dresses for autumn weddings capture the essence of the season. Wit...h styles ranging from polished midis and flowing maxis to structured statement looks, this collection of autumn dresses for wedding guests has an option for every celebration. With modern silhouettes, intricate finishes and all the must-have hues of the moment, find your autumn wedding guest outfit below below.