The couple were seen sharing a quick kiss while Casper, 28, came visiting the 45-year-old singer as she filmed the new police drama, 'Shades of Blue' in New York.
Despiet breaking up during the Summer, the on-and-off pair have managed to put their past behind them to give their love affair another try.
A close source to Jlo tells People Magazine, ''Just because it ended didn't mean they had to be enemies. She cares for him very much. He's a good guy. He's really a very good, stand-up guy."
However, during a recent sit-down on The Ellen DeGeneres Show, Lopez could neither confirm nor deny the speculation; "Yeah, yeah. I'm kind of not [single], but I kind of am," she told the host.