Sadly, not the first - I went to a wonderful wedding some 15 years ago, which, amongst other things, featured the bride walking down the aisle to the original BG theme music. Specially transcribed and played by the local silver band, bless (they were lovely, and reprised the performance at a convention she ran a few years later). And they're still married!

But she didn't have Anya's bridesmaids' dresses.