Khloe Kardashian and Tristan Thompson were both under the same roof Saturday night, but we're told it was only mutual friends that got the former couple there ... they didn't show up together.
Khloe and Tristan hit up the birthday party of LeBron James' wife, Savannah ... who turned 35 Friday. We're told the two arrived -- Tristan in a black Rolls, and Khloe in a black Escalade -- and left separately, and have some of the same friends ... so it makes sense both were in attendance.
The party went down at The Classic Cat restaurant in WeHo.
Video from the party shows Khloe and Tristan standing in the back of the room during a performance by Giveon. Screenshots from The Shade Room also show the two of them together at the event.
Adele and Rich Paul were among those celebrating, along with a slew of NBA stars, including Chris Paul, Chris Bosh, Russell Westbrook and Carmelo Anthony.
Khloe was hardly secretive, posting a shot of her outfit (above).
The official party line we've been getting from the fam ... Khloe and Tristan are getting along just fine as co-parents, but they're not together.