The country's first surviving sextuplets have entered their teenage years. Adrian, Brenna, Claire, Julian, Quinn and Ian Dilley turned 14 in May.
"Good Morning America's" Diane Sawyer has followed the children since their births, visiting and interviewing the family several times as the children have grown up. The family's latest visit to "GMA" will air Wednesday.
Watch "Good Morning America" Wednesday to see what the Dilleys look and sound like today.
The children, who are now in high school with their six lockers all in row, were born after Keith and Becki Dilley tried for six years to have just one child.
Becki, who finally became pregnant with the help of fertility drugs, was expected to have five babies and a dangerous pregnancy.
She got so big she couldn't fit into her shower and gained nearly 100 pounds. Doctors actually tied her uterus closed in order to keep the babies inside.
When the next generation of Dilleys finally arrived, it took 30 doctors and nurses to deliver the babies. When they prepared to sew Becki up, they felt another foot. Their five expected children had become six.
Adrian, the sixth baby, was hidden behind Becki's spleen.
Raising one infant can be taxing, and having six babies multiplies the cost. ABC News calculated that when the children were babies, the family filled and fed 30,000 bottles and gave 13,000 baths. It washed 7,000 loads of laundry and changed 20,000 diapers.
Keith and Becki did all of it without the aid of a nanny or day care. During the sextuplets' first year, Becki worked as a nurse and Keith stayed at home to watch the children.
But getting through their infancy wasn't the most challenging part for the Dilleys. They still had to make it through the toddlers' terrible 2s — times six.
"[There are] days when you just can't wait for that day to get over. You put them to bed that night and you just go, "I hope tomorrow's better," Keith said when the children were 2.
As the sextuplets grew, they gained more responsibility. Becki made a wall of chores for the littlest Dilleys and paid them each day in Dilley dollars. With their funds, the kids bought special treats like alone time with mom and dad — away from the normal family chaos.
Now each child has developed distinct personality traits. Surprise baby Adrian has been full of wild energy since the day he was born. As a child, he gave himself a bad haircut just in time for school pictures.
Claire, who was fearless when a stranger held her as an infant, grew to be the toddler giving out orders and wagging her finger.
"She's the definite type-A, overachieving young woman," Becki said.
Ian is thoughtful and observant. He's the artist, but also a showman who was all too willing to show his dance moves off growing up.
Brenna took on the role of caretaker; she was the little mother, who always carried her baby doll. Now, the born nurturer is less shy.
Julian was the most dramatic Dilley. He would crouch down by a door's crack to make sure you heard him as he spoke through the door. As a child he wanted to be a zoo keeper.
Finally there is Quinn, the cheerful, determined stickler for the rules.
"He wants to be a police officer," Becki said. "It's black or it's white. There's no gray."