We can all thank Stone Fox Bride for bringing us this image:
Yes, that is Girls star Jemima Kirke (Jessa) kissing another bride.
Just so we are all on the same page...Jemima Kirke.
The company goes on to say of it's 2013 line:
We'd like to think we have a dress for every batshit bride out there: the hot punk with the shag bangs and skull tatts, the bedraggled bohemian with blue eyes and hair to her ass, the chic minimalist with mellow style who's indifferent to fashion and couldn't care less about trends.
They also featured her in this dress: