Identical Twins Marry Identical Twins—and Now Their Kids Are Siblings

The couples returned to the Twins Day Festival for a joint ceremony in 2017 before moving to Virginia where they live together and run the wedding venue Smith Mountain Manor.

In 2021, both sets of twins became parents: Brittany and Josh welcomed son Jett, now 3-years-old, in January, and Briana and Jeremy's son Jax, also 3, was born just a few months later in April. Because their parents are identical twins, Jett and Jax share DNA close enough for them to actually be genetic siblings.

"They are technically known as quaternary twins," Briana explained to ABC News. "So they, because they are genetic brothers and they were born less than 9 or 10 months [of] each other. They're genetic brothers [and] the same age."

The twin couples have never shied away from sharing their lives in a quaternary marriage—a term used to describe identical twins marry identical twins—with the world, giving their fans a peek through their shared Instagram account.

"Talk about a flock of a feather!" they posted on Jan. 10, alongside a video set to Billie Eilish's "Birds of a Feather." "Love and twins abound! We're twins married to twins, and we've got DOUBLE DOUBLE DOUBLE the fun raising our astonishing quaternary twin sons together!"

They also posted about their recent holiday celebrations, sharing a slew of photos to Instagram Dec. 14 and writing, "Jett and Jax love the tradition of building and decorating gingerbread houses. This holiday, gather your little elves for a delightful gingerbread house decorating adventure too! Spark creativity with gumdrop rooftops, candy cane paths, and plenty of togetherness."

But that's not to say their lives are entirely without conflict—although they have figured out how best to navigate issues in their quaternary marriage over the years.

"If Josh and Jeremy are in an argument, Briana and I try not to get into it," Brittany told People in 2023. "If Briana and I are in a disagreement, Josh and Jeremy try to not get into it. That's probably good advice for anybody who's married."

She also noted that they bring "a forever dating" approach to their marriages. "Each couple does a good job of striking that balance of, yes, being best friends and family, but still keeping a certain formality," Brittany noted. "I think a lot of couples slip into that, and I think that works against them. We're so close, but we do keep it a romantic relationship."

And of course, Brittany and Josh and Briana and Jeremy are incredibly thankful for the somewhat unconventional turn their lives have taken.

"It's important to really look and see what you have," Jeremy told the outlet, "and be thankful for what you do have."