Did you involve your siblings in your wedding? If so, did you include all of them, or just the one(s) you are close to? Are they in your wedding party? Or did you give them another task (such as a ceremony reading or escorting a family member down the aisle)?
My fiance and I are including some, but not all, of our siblings. My sister is my MOH, and my brother and brother-in-law are both ushers. My fiance decided to not include his siblings in our wedding at all.