Jennifer Lopez is "inseparable" from her new toyboy lover.

The star has reportedly been dating dancer Casper Smart, 24, for the past few weeks. Casper began performing on Jennifer's world tour earlier this year and the pair have become close recently.

They are said to be enjoying a passionate romance, but are in no rush to commit.

"Casper said J-Lo has an amazing body and she's in better shape than any other girl he's ever been with," a friend of Casper's told British newspaper The Sun. "He said she's got the body of a 20-year-old. They're inseparable right now.

"It's just about sex and no one's sure if it has much of a future. But he's having a good time finding out."

Jennifer and Caspar have been spotted partying in Las Vegas and also leaving several hotels together.

The 42-year-old beauty enjoys hanging out with the dancer and they have formed a close bond.

"It's a fun fling", a source explained. "They're dating and having a good time."

Casper, who is from California, regularly dances at a club in Los Angeles. He proves popular with the opposite sex as he often "goes shirtless" while showing off his moves.

He has also appeared in dance movies Step Up 3D and Honey 2. He was one of the Single Ladies dancers in the 2010 episode of Glee and he danced with Beyonc Knowles during her 2010 Grammy Awards performance.

Jennifer split from her third husband Marc Anthony earlier this year. She was previously married to Ojani Noa and dancer Cris Judd.