Jennifer Lopez and Ben Affleck's "chemistry is off the charts" amid rumours they're back together, according to a US report.
It has already been almost two decades since the songstress and actor dated but they have been spending time together in Montana and Miami and are rumoured to be giving their relationship another go.
The former flames are said to be working on rekindling their romance, and it's claimed they are head-over-heels for each other.
"Jen and Ben have been all over each other and can't seem to get enough — all day, every day. Their chemistry is off the charts," a source told US Weekly.
They added: "They are always affectionate."
J-Lo called off her engagement to Alex Rodriguez in April after two years.
She was later spotted with her ex Ben, and has since enjoyed two breaks away with him.
The source also added that Jennifer, who is glowing at the age of 51, has "influenced" Ben's recent style change.
It comes after she was reportedly really "impressed" with how the Hollywood star has "stepped up his game".
According to an insider, she is loving the fact that the Batman actor has been "making a huge effort."
"J.Lo thinks Ben has really stepped up and loves this version of him," the source told E! News.
"It's comforting to her and she is smitten. They are giddy together and you can tell she's really happy."
Bennifer first met on the set of their movie Gigli in 2002 and sparks flew from there.
Months later, their love flourished and the high-profile couple soon decided to get engaged.
They later broke it off in 2004.
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