Identical twins Diane and Darlene Nettemeier married identical twins Craig and Mark Sanders.
The sets of twins, from Texas, fell in love, went on a double date to Las Vegas, and won thousands of dollars at poker.
Sensing they were on a winning streak, they got engaged on the same day, married at a joint ceremony (officially "quarternary marriages"), and built a pair of homes, side by side.
Soon afterwards, despite a million-to-one odds, Diane and Craig went on to have identical twins of their own - Colby and Brady, now seven. [Link]