Check out Kendall rubbing elbows with Julie Simmons at the Wells Fargo Center in Philadelphia -- where Ben and the 76ers beat up on the Houston Rockets in a 121 to 93 victory.

Ben's stat line wasn't spectacular -- only 9 points, 6 assists and 6 rebounds. And, he only hit 3 of 12 shots, which is bad for him (he usually shoots well over 50%).

But, who cares about individual stats when your team wins, right?

Plus, the most important question ... did Kendall and Mom get along?! Pretty well actually. The two were seen smiling and chatting. Good times.

It's not the first time they've kicked it together -- Kendall and Julie hung out at a game back in November 2018 and got along great then too.

Ben and Kendall have been dating on and off since May 2018. The next big question ... when does Julie get to come to L.A. to meet the rest of the Kardashians??