Kailyn Lowry has been an MTV staple since she was 16.

Briana DeJesus was just added to the Teen Mom 2 cast in March, a move that stunned both fans and cast members of the wildly popular series.

Right off the bat, insiders claimed that the other ladies were pissed about DeJesus joining the cast, but it seemed to be nothing more than irritation over being forced to share screen time.

Briana DeJesus Selfie

Now, it seems the vets may have real reason to be side-eyeing the rookie, as she’s bringing all the attitude that MTV is paying her for and then some.

Already, Briana is feuding with Jenelle Evans on social media, and it seems the other ladies aren’t that crazy about her either … with one notable exception.

Kailyn Lowry is the only one of the original TM2 cast members who follows Briana on Twitter, and it seems like they big fans another’s tweets.

In fact, they’ve taken to get each other’s backs in their respective online skirmishes.

Briana DeJesus Photograph

Yesterday, during one of their daily shade-throwing sessions, fans started trashing Kailyn for having three baby daddies.

When a fan pointed out that Briana is currently pregnant by a mystery man (as Kailyn was, until she recently identified her baby daddy as Chris Lopez), the focus shifted to the newest member of the TM2 cast.

One fan asked what Briana would do if she found herself pregnant by a third different guy.

She responded that she’d turn right around and get knocked up by a fourth:

“B-tch then I’ll do it again… TF LMAO,” she tweeted.

Lowry, K

Kailyn quickly reweeted the comment and added a laughing-till-crying emoji.

Yes, it seems these two are bonding already.

Guess not all of the Teen Mom 2 gals hate Briana after all.

Which is good, because she’ll need someone in her corner when Jenelle comes at her with fists flying during this year’s reunion show.

Watch Teen Mom 2 online to relive the show’s most bonkers moments of the pre-Briana era.

DeJesus will have some big shoes to fill in terms of delivering drama … but something tells us she’s up to the task.