Jennifer Lopez is back with her toy boy ex Casper Smart

Jennifer Lopez is back with her toy boy Casper Smart, with the two being spotted kissing in West Hollywood this week.

The pair, who split last June but have always remained close friends, were all about the PDA outside the American Idol studios.

In the last few weeks, JLo and 27-yearold Casper have been spotted together a few times, with her children Max and Emma, with ex-husband Marc Anthony.

But it was believed he was just fulfilling step-dad duties as he's maintained a close relationship with the twins even after their split.

Until now. Pashing in public…that says, they are very much on.

Earlier in the week, before the kiss, choreographer Casper attended 45-year-old Jen's new film Home, in which the above single appears.

"We got a lot of ties. We're very close," Smart told E! News at the premiere. "We're friends. We're very good friends."

Very good friends, wink wink, nod nod.