Do they have they actual rings tied to the pillow? or do we just tie fake ones? They will only be 2 years old and at this point we don't even know if they will walk down the aisle let alone hold a pillow! So does the best man hold both rings? or the best man and the maid of honor?
I would NOT let the 2 yo RB hold the rings. Too dangerous! Little kids are so unpredictable. As for who holds them, I think it depends on your service. All I know is the traditional Catholic service, where the priest says, 'may I have the rings', which makes it easier for the BM to hold them both. But, ask your officiant - they'll tell you what to do.
Our RB held fake rings down the aisle. Our best man held the real ones.
RBs had fake rings and the Best man had both the real one.
