In some cases father walks bride and in some cases parents walk bride. I don't think I've seen mother walk down the aisle, generally she would already be seated but you can have a groomsman walk her down.
Honestly I was wondering this myself, but I don't think there's a "rule" to it like i was thinking lol. I've seen many scenarios like the ones explained above, and I've also seen the groom walking both mothers down the aisle. Its whatever you feel comfortable with I guess. Unless you're doing a church wedding. In my fiance's sister's wedding, the ushers (the other groomsmen) had walked the mother of the bride to her seat. And by the time the processional started, the BestMan walked the mother of the groom down the aisle and the MOH walked down by herself
I had my brother escort my mom in. If you have any ushers, they can walk her in. I've seen lots of different arrangements though, I've seen the mom already seated, I've seen the groom walk the MOB in, I've seen the MOB walk the bride. However you would like to arrange your processional is fine.
H's parents walked together. My brother walked my mother down the aisle. My 12 yo niece (our ring bearer and chalice lighter) walked with our officiant. H and his BM walked together. My two BMs and 1 MOH walked in pairs with H's three GM. My 2 yo niece and 4 yo nephew (our flower children) walked in right before my dad and me.
Mom can be escorted by anyone she'd like to have escort her. In our case, my brother escorted our mom. He was also a GM, so after she was seated, he returned up the side of the ceremony area to join DH and the other GM and then walked in line with them from the side up to the front.
DH's parents are divorced, so MIL was escorted by her husband and FIL actually escorted my Grandmom, as she is widowed and his girlfriend couldn't attend. DH's step-grandparents walked together.
My mom will walk with her husband. FH's parents will walk together. Grooms party and groom will come through a side aisle. BMs and MOH will walk down center aisle alone. Ring bearer then two flower girls. I will walk alone at the end.
If you have a brother or if your mom has a brother, they could walk her down the aisle. Really though I think anyone could walk her down, but it's usually a guy from her family. I'm just having my mom and dad both walk me down the aisle, so I don't have to worry about who is escorting my mom.
This is a hot topic in our family!! I'm the 5th one to get married in my family and we've followed the same rules at every wedding. We have step family involved too, which complicates things. My mom feels it's a sign of respect to have the Groom escort the moms - sort of the opposite of dad giving away the bride. I am breaking tradition a little bit and walking in alone but this is our processional:
Groom (or usher or BM) escorts MOG (FOG follows behind)
FOB escorts StepMOB
Groom escorts MOB
Groom stays at alter
Bridal Party procession (BM GM, BM GM, MOH BM)
@LaTasha - don't let them walk-in alone. have the Groom walk them down, either together one make 2 trips. they are very special women in your lives and deserve an escort.
My brother (a groomsman) will be walking my mom down the aisle.