Please find a movie by the wedding scene to help plan my wedding

Hello, I hope you’ll help to find a movie, I remember only one scene. It’s an old movie and the scene is in the beginning (if I remember correctly). Its the wedding in the ruins, the night and there are plenty of lightbulbs and very lovely slow song is playing. Something like Moon river by Audrey. This scene can be a dream of an actor, but I cannot fully remember