The Keeping Up with the Kardashians star, 38, was photographed walking with 23-year-old model and former boxer Younes Bendjima in West Hollywood, CA, Us Weekly reported.
The pair stepped out together on Tuesday, May 2, but were both using their cell phones. Kardashian and Bendjima were ironically both wearing light blue jeans and white tops, as Kardashian was sporting a casual tank top and Bendjima was wearing a plain T-shirt.
"Kourtney and Younes are not serious," a source told Us. "They are hooking up."
Despite the fact Kardashian and Bendjima have allegedly been intimate for at least four months now, the source insisted they're just having fun and the relationship is not official.
Prior to the pair's latest public outing, they were reportedly spotted hanging out together at Kardashian's birthday party last month at Chateau Marmont, however, they managed to avoid cameras.
Kardashian and the former boxer have been involved since October 2016, according to TMZ, which is well over a year after the reality TV star split from the father of her three kids, Scott Disick, in July 2015.
Kardashian reportedly pulled the plug on their romance of nearly a decade when he was spotted getting touchy-feely with his ex-girlfriend Chloe Bartoli in Monte Carlo. Kardashian also struggled to deal with Disick in light of his former substance abuse issues.
Ever since the breakup, Kardashian has seemingly been enjoying the single life -- while amicably co-parenting with Disick. She was previously linked to Justin Bieber and Quincy Brown.
Disick feels "betrayed" over Kardashian and Bendjima's fling, TMZ reported, because he held out hope Kardashian would give him another chance and they'd get back together if he could prove himself worthy.
Sources close to Disick told the website that he was "devastated" upon seeing Kardashian's pictures with the handsome young model.