Rose accessorised her look with a flower crown and a flowing veil, with Kit's button hole perfectly matching the flowers in her hair.
There's no denying that Kit and Rose themselves looked sensational, but what were their Game of Thrones co-stars wearing?
Our personal favourite character is Tyrion Lannister, and we were overjoyed to see the actor Peter Dinklage in attendance, dressed up in a smart blue suit.
Kit Harington's onscreen sisters Maisie Williams and Sophie Turner went for a more relaxed style, with Maisie rocking a black jumpsuit and red patent heels, and Sophie opting for a red blazer dress, accessorised with black thigh high boots.
Emilia Clarke was also in attendance, and looked a far cry from her on-screen character Daenerys Targaryen.
Emilia chose to wear a calf length floral dress in muted pink, compete with a dusty pink blazer court and nude court shoes.
Which of the actors' outfits do you like best? We think we might be most keen on Maisie's...