The most classic of the bunch, Liam chose a three-piece black suit with a white shirt, which coordinated perfectly with girlfriend Sophia Smith's tight-fitting LBD.
The only member not in attendance? Zayn Malik, who's engaged to Little Mix's Perrie Edwards and sparked rumors of marriage when sporting what's thought to be a "mangagement" ring in one of his instagram photos. We wonder what he was up to, wedding planning perhaps?
All in all, the boys were as perfectly outffited for this sunny Sunday afternoon nuptials as they are on stage or the red carpet.
As for the bride, Johannah went with a 3D floral appliqué-embellished dress with a deep V-neck and fluttering cap-sleeves.
All-in-all, it looks like the classically British affair was a picture-perfect day!