Antoinett Maxey/Hays Free Press

Proud parents, grandparents and friends filling the rows at tonight's graduation ceremony for the Lehman High School class of 2012 should not be concerned if they start to see double.

The central Texas high school counts not one, not two, not even three but nine sets of twins among its 401-strong graduating class.

Though the nine sets of doubles have been in school together for  roughly 720 days over the past four years they did not discover that so many of them shared such a unique connection until the end of their high school careers.

"We had an idea that we had a lot but we didn't realize how many," one of the twins, Kody Banda, 18, told Goodmorningamerica.com.

It was Kody's fraternal twin brother, Kyle, a member of the school's yearbook staff, who figured out the unique demography of Lehman High's 2012 graduating class.

"I said, 'I know we have at least four sets of twins in our senior class,' and then I discovered there were more," said Kyle, who put the clues together while assembling the yearbook's senior page section.  "I met a few more whom I had no idea they were twins until I made the discovery."

An article written by Kyle about the twin-spectacular in his graduating class was picked up by local media and the rest, as they say, is history, multiplied by two, in this case.

News outlets far and wide have now been calling on the twins to share their  stories.

"A lot of the twins, we played sports together and everyone kind of knew each other," Kody said.  "Nobody realized it was such a rarity but now it's a big deal."

Also not clued into the rarity of nine sets of doubles in one senior class was the school's own principal, Don Rusinger.

"I actually had no idea that we had that many, although I know each one of the kids," he told Goodmorningamerica.com. "As you get to know them you think of them each individually."

"I was like everybody else, I went,' Wow,'" Rusinger said.  "We have 401 students and 18 of them are twins.   I don't know what the odds are.  It's pretty cool."

Once the school realized the phenomenon, they looked into whether it was a record but found out they were still behind the world record of 13 sets of graduating twins set by a Connecticut high school in 2010.

The mother of the Banda twins, Amy, says the many multiples in her sons' class is a reflection of the growing number of multiples in the population as a whole.  She says that though her sons share a birthday and a  link that not many others can claim, they still have their differences.

"They're night and day," she told Goodmorningamerica.com.  "One of them is very athletic.  My other is a little more introverted."

Kody will be attending Louisiana State University, where he's already made the cheerleading squad, while Kyle will stay closer to home and attend Tartleton State University, near Forth Worth.

"The main thing is that we know we're different but we have a connection," Kyle said.  "We have a special relationship with each other.  When you have a brother you know you have a special friend but when you're a twin you share more things."

Even if Lehman High's class of 2012 had grabbed the world record this year, they likely would not have held on to it for long.  One Connecticut high school is on track to graduate 16 sets of twins in 2016, according to UPI.