wedding

On a slightly different note, my neighbour, a lovely man, had "You'll never know how much I love you", at his wife's funeral, followed by "You are my sunshine".
I was in bits. They had been married for 60 years and he adored her.
My father used to sing "You are my sunshine" to my mother as well.

Thank you all, hard to choose

First, congratulations and best wishes!

Second, I love the idea of "Let's face the music and dance" for an exit song. Also, "Celebrate!" Anything lively that's appropriate. For the register signing, if it's a second wedding, there was a song years ago that I think was called "The Second Time Around" (with lines like "Love is lovelier the second time around," etc.). If it's a first wedding, then maybe "At Last," as some have suggested. Or Dean Martin's "Everybody Loves Somebody Sometime."

Whatever you choose, I'm sure it will be lovely! Have a wonderful day!