United Kingdom, June 4 -- Jennifer Lopez and Brett Goldstein "have great chemistry".

The 56-year-old actress stars alongside Brett, 45, in Office Romance, the new romcom directed by Ol Parker, and although they're not currently dating, a source claims there is definite "chemistry".

The insider told Us Weekly: "She and Brett have great chemistry, and that made working together on set easy and enjoyable.

"It was instant chemistry from their first call about the project. She thinks he's incredibly charming, talented and just a really good guy."

There is "nothing romantic going on between them besides flirtation" between Jennifer and Brett. But the actress' friends think her co-star is a real catch.

The source said: "Jen's friends joke w...