2:09 PM PT -- Ayo Edebiri stood shoulder to shoulder with Jennifer Lopez for a new 'SNL' promo that just dropped -- and it's hard to say if there's any sour feelings between them after this pod news dropped.

Check out the three promos that were just uploaded on the 'SNL' page ... it's Ayo standing in the middle with Jen to her right and Heidi Gardner (a cast member) to her left. They rattle off some lines, and the first take seems to show Jen and Ayo expressing their mutual fandom.

Like we said, there's no true way to tell if Jen's mad -- the body language is pretty neutral. It's possible they shot these before the news dropped ... so we'll see how Saturday goes!

Well, this is awkward ... Ayo Edebiri eviscerated Jennifer Lopez's talents 4 years ago -- well before she was super famous -- and now ... the 2 of them are doing 'SNL' together.

The 'Bear' star is this weekend's host, and Jenny is the musical guest -- so you gotta imagine her resurfaced comments could make it a little bit awkward during rehearsals ahead of the big show tomorrow night.

Ayo was featured on a podcast in 2020 with a woman named Laci Mosley who hosts "Scam Goddess" -- which is dedicated to uncovering "scams" in the public eye and gossiping about them. In this particular episode, she had Ayo (who, again, was not a big-time TV star yet).

Right from the get-go, they start to discuss one "scam" they perceive ... and that would be the "career" of J Lo -- their words, not ours. Ayo then trashes Jen in very harsh terms.

You can listen to her remarks for yourself -- but essentially ... Ayo and Laci are yukking it about the notion Jennifer just isn't that great of a singer, at least in their eyes -- and they believe she's fooled the masses into thinking she's this fantastic vocalist.

Ayo herself even leans into this long-standing (and unfounded) rumor that J Lo has allegedly used ghost singers in her career ... something AE runs with as fact, and just further evidence (from her POV) that Jen has fleeced the industry. Like we said, this is rough.

There are more mean comments that Ayo and Laci make, which we won't include here.

Anyway, the bigger point is ... Ayo and Jen are literally in the same building right now, and they will most certainly see each other over the next 24 hours, so it'll for sure come up.

The question, of course, is ... will they be able to play nice and get through the show?

Sources with direct knowledge tell TMZ ... this incident with Ayo was long ago, and that she is most certainly a fan of Jenny right now -- we're told she's excited to work with her and be in her presence. As for Jen ... our sources tell us she doesn't usually let these sorts of things bother her -- and that her mantra is about moving on and moving forward.

We're told J Lo is looking forward to working with Ayo this weekend.