Well, think again, 'cause Kanye West's ex-wife and current wife were hanging out at Ye's listening party Tuesday night – and it was all caught on video!!!

Check it out ... Kim was standing with Bianca behind a police barrier, grooving and mouthing the words to a song from Kanye's newest studio album "Vultures 2."

Amazingly, they seemed chill and comfortable in each other's presence at the Chase Center in San Francisco. But one thing was obvious -- the women were not best buds or getting chatty with one another, at least in the footage posted on social media.

Still, this was totally outta left field. Even their fans were stunned and started gossiping about it on "X" after the footage spread like wildfire.

These were just some of the comments posted on the app: 'Didn't expect that'... 'What on earth would they be taking about?'... ''I don't know but this is crazy'... 'Yo WTF.'

As you know, Kim was hitched to Kanye for nearly seven years before their divorce in 2021, settling it a year later. The couple shares four children: North, Saint, Chicago and Psalm.

Enter Bianca Censori, a former employee of Kanye's company, Yeezy. The two were first seen out together in early 2023 before tying the knot in a private wedding ceremony.

Since then, they've been gallivanting around the world ... as Bianca prances around in public half naked and sometimes even more than half, wearing sheer tights.

While Kim and Bianca have seemingly had an amicable relationship, it's been reported Kim wasn't too happy about Bianca dressing in revealing outfits while around the kids.

But now all's cool and they're bonding at a Kanye event. Or is this Kim's play to calm her ex?

Stay tuned ...