Wife and I in Wedding Party With Newborn

I would have baby in ergo baby with some flowers. Baby will be quieter if with the mom

Do you happen to have a nanny that could come with? Or your mom/MIL?

If not, I would check with the bride and groom. They have to know y'all will need accommodations and I expect will be totally down to help figure out the best plan that suits you, baby, and their ceremony.

Congrats on your pregnancy!

I think this is a unique decision to each couple/ family. Our best friends are in our wedding party, and they will have a 3 month old at our wedding. One set of the baby's grandparents is also invited to our wedding, and grandma will watch the baby during the ceremony. I know it wasn't an easy decision, but they didn't want to miss the day. However, not everyone is in this position with childcare, so you need to make the decision that's best for you.

Either carry the baby, or one of you stays in the wedding party and the other stays with the other parent.

Our friends that were in our wedding had two kids, one was our RB (she was 4 years old) and the other was just shy of 5 months old. His brother and SIL lived nearby, so they asked them to watch the baby during our wedding. They booked his brother and SIL a separate room at the hotel where we got married and they arrived in time to start watching the baby by the time we started pictures before the ceremony (the baby spent lots of time in the bridal suite while we were relaxing and getting ready and went to hang out with dad once or twice). The baby stayed with his aunt and uncle until cocktail hour, and then my BM took a break to feed the baby. They decided not to bring the baby down to hang out during the reception (we encouraged them to do whatever they wanted), and instead my BM just periodically slipped upstairs to do additional feedings and give cuddles.

Maybe consider bringing your mom or your wife's mom, or another trusted relative or sitter to help with caring for the baby, at least during the ceremony? Or your wife could consider carrying the baby in place of a bouquet. This same BM was in a different wedding shortly after the birth of their first child and totally held her newborn during the ceremony.

Congrats! Have you talked to the couple yet? They might be okay with one of you just holding the baby. If it's a short ceremony, your wife can feed the baby right before, them he or she might sleep through the whole thing in one of your arms!

I was hired as a babysitter for my friends who got married. The had a baby pre marriage. I was there the whole wedding, but it sounds like you only need a babysitter for the ceremony? Maybe you could talk to the couple getting married and see if they would be okay with you having a babysitter there for this time?

This is really a personal choice. I just went to a wedding with a couple who had a 7 week old baby, and they were comfortable leaving her at home with grandma overnight (since they were OOT guests). But there are many couples who would not feel comfortable doing this, and only you and your SO can make that decision. Do you have anyone you can bring with you who can watch your child during the ceremony (since it sounds like that is the only time you would need one)? Or as PPs suggested, would the couple be okay with your SO holding the baby? My sister (my MOH) had to hold my 2 yo niece for most of the ceremony (she was being unusually fussy), and it was not a big deal. Edit - clarity/words