Identical twin sisters married identical twin brothers (and we have too many questions).

Twin sisters from the United States also became each other’s sister-in-law this week, after they married another set of identical twins.

Brittany and Briana Deane, 32, wed Josh and Jeremy Salyers, 34, at the 2018 Twins Days Festival in Twinsburg, Ohio, on Saturday; the same event at which they all met a year earlier.

The quartet’s nuptials were captured by US television TLC to air in early 2019, and revolved around the theme: ‘Twice upon a time”, you know, because there are two of th… Yep. Sorry. You get it.

A photograph shared by the network shows the women posing in identical wedding gowns with identical veils alongside their husbands who, yes, were sporting identical tuxes.

“We got engaged together; Josh and Jeremy proposed at the same time, so it made sense that we have one big, double wedding,” one of the women (we’re not entirely sure which) said in a teaser clip.

The two-in-one wedding (technical term: Quaternary marriage) was a dream come true for the loved-up quartet, all of whom had hoped to marry into another twinship. Yet while the women were realistic about the "incredibly scarce" chance of that actually happening, for the blokes it was non-negotiable.

“If they couldn’t find identical twin girls that matched up well with them, they were never getting married,” Brittany told PEOPLE. “I think that they experienced a lot of the same challenges dating what we call 'singletons' - that means non-twins. It’s hard when you’re dating someone and they don’t understand the twin bond.”

Brittany and Briana recognise how fortunate they were that they found their perfect twin-pack spouses; some media reports have identified just 250 such marriages worldwide.

“The stars had to align for our dreams to come true," Brittany said. "I get to marry the man of my dreams and at the same time I get to look over next to me and see my twin sister marrying the man of her dreams.”

After honeymooning at Canada's Prince Edward's Island ("same resort, different rooms!"), the couples plan to live together and raise their families under the same roof.

Those children, Brittany pointed out would be more than just cousins - genetically speaking, they'd be more like siblings.

(Yep. Identical twins share the exact same genetic material - egg/sperm and all - so between the four newlyweds, there are technically only two 'sets' of DNA.)

"We imagine it will be like two moms and two dads all raising our families together,” she said.

Does anyone else feel like a reality show may be immanent?

Don't have a twin to share your wedding planning? Hitched can help.