The seemingly cordial encounter occurred outside the club, where Smart was also hanging out. The 29-year-old actor and dancer was seen holding a bouquet of flowers when he happened across Lopez and Remini.
It's unclear if Lopez, Remini and Smart were all attending the same event at the nightclub or if the run-in was simply a coincidence.
Lopez and Smart first sparked romance rumors in October 2011. The couple called it quits in June 2014, but rekindled their flame in January 2015 before splitting once again in August 2016. They have reportedly remained amicable since parting ways.
Following her break up from Smart, Lopez sparked a romance with the "Hotline Bling" rapper, whom she's "head over heels for," a source recently told ET. For more on their burgeoning relationship, check out the video below.