The sisters are fun — especially when played by Ashley Jordyn and Lauren Kelston in their ’70s era flashbacks.

Barb and Carol get one of the more vicious backstories of the series (and the only flashback this year worth the bother).

It’s Carol and Barb Denning that internet is really losing it over.

And here’s a credit (I assume) not many of her costars have: she’s also a certified yoga instructor, and she practices and teaches yoga.

In true OITNB fashion, Season 6 is complete with flashbacks from younger versions of the imprisoned women, including a young Barb, who is played by Lauren Kelston.

My personal favorites were a pair of sisters named Carol and Barbara, played in the present by Henny Russell and Mackenzie Phillips and in flashbacks by Ashley Jordyn and Lauren Kelston.