It doesn't have to be fancy, just a TARDIS out on the hillside and some creative costuming.
This paper bouquet incorporates pages from Stephen Hawking's A Brief History of Time and has a sonic screwdriver handle. Don't forget the paper boutonnière for the groom!
The bridesmaids' dresses:
Bridesmaids in sparkly midnight blue will be the night sky to your bright, white star.