The first surviving set of African-American sextuplets graduate from high school in Birmingham, Alabama.

Being a parent is a wonderful experience. But it's one of the most challenging jobs in the world. And Diamond and Chris Harris can attest to this, for they've successfully raised sextuplets!

The Harris family consists of girls Kalynne and Kiera, boys Kaleb, Kobe, Kieran, and Kyle — the first-ever surviving set of African American sextuplets across the country.

These siblings recently celebrated yet another milestone as they all finished their senior year at Center Point High School.

Giving Birth to Sextuplets is Extremely Rare

But it can happen! And these America's first-ever surviving sextuplets are living proof.

When Diamond and Chris decided to start a family 18 years ago, they were only hoping for one more child.

At the time, Diamond's first child from a previous marriage, Dewayne, was five. So the couple wanted him to have a sibling.

However, they struggled to get pregnant and decided to consult a fertility doctor.

The physician prescribed Diamond a hormone but told them not to get their hopes up too much.

The Fertility Drugs Worked so Much More Than They or Doctors Expected

When Diamond went for a checkup after discovering she was pregnant, doctors initially told her she was expecting twins.

But after sonography, doctors revealed five babies were actually growing inside of her.

A few months into the pregnancy, Diamond developed complications and underwent a C-section. Only then did doctors learn she was actually having six babies, not five!

Diamond and Chris's Lives Have Changed Ever Since

Their kids became the first-ever surviving set of sextuplets in the US.

And as they grew up, the Harris sextuplets had brushes with fame. They are in a Discovery Health documentary and also appeared on Oprah Show in 2007.

Chris is a teacher, while Diamond is a former nurse. She quit her job to care for her sextuplets.

The Odd-Defying Siblings are Now Officially High School Graduates!

Although they're proud of their children, Diamond and Chris admit they felt a little emotional on the graduation.

Diamond told Today:

"The morning of the ceremony, I sat in bed, looking at their baby pictures, and felt depressed. It's going to be too quiet."

Chris added:

"These kids have been my life for almost 18 years. They have been my reason. I keep reminding myself it's just going to be different, but everything will be OK."

Kobe and Kiera will attend Lawson State Community College, with Kiera studying cosmetology.

And Kaleb and Kieran will attend Alabama A&M, with Kaleb majoring in computer science and Kieran pursuing art.

Kyle, who has autism, will do a life skills program. While Kaylynne will go to Alabama State University for its physical therapy program.