Is it okay

It's not traditional...but who cares? The bride (and groom) should be able to have anyone and anything they please and choose in their wedding, it's THEIR DAY for crying out loud. The only thing that's really important about the wedding ceremony is the vows and that they are sincere and taken seriously. The "wedding" is only for show anyway, it's for the people who attend and not really for the bride and groom (a lot like funerals are for the living and not the deceased...no relation to the two intended). The purpose for the wedding is supposed to be only for two people to take vows and make a public legal commitment to each other in front of witnesses...and the only purpose for that is to send the message that these two are only for each other and now "off limits" (unavailable).