First wedding I ever went to was my cousin's. It wasn't religious, but Irish - both the bride and groom were of Irish descent.
Second was another cousin. This was straight-up Catholic.
The third was my best friend's wedding, and it was Buddhist - he and his wife actually met while studying to convert to Buddhism. There wasn't a lot of religion. A nun conducted the ceremony, and said a long chant in Tibetan (which she actually cut short, on account of my obvious discomfort in direct sunlight). Then my friend and his wife made declarations of love, and that was that.