A professional musician friend supplied the music for our wedding. Since he often got me up to play Celtic tunes with him at various gigs, and my wife loved the music, we decided to have it at our ceremony.
She came up the aisle to a beautiful rendition of the “Pride of Erin” waltz and we went back down the aisle to “Mairi’s Wedding.” Both were played on the fiddle.
There were also classical guitar renditions of various Celtic folk tunes before the ceremony and during the signing of the register.
Of course, with our friend, myself, and plenty of amateur musicians (a few of whom had brought their instruments) in attendance, the reception turned into a ceildh.