ouuuh Wonderful photo ! It looks like the two taller ones may be brothers, the face shape seem to be the same. Joe does not seem to share any resemblance ... maybe if he had a moustache?
This is a beautiful photo, I love the composition, the fellows are all handsome and well dressed. The middle one is a groom? I think that is a boutonniere (at least it looks like a flower to me!)
Thank you so much for sharing Steph !