Cameron Diaz and A-Rod reunite for round two of their on/off romance

They broke up in October amidst rumours of jealousy and fighting. But now it looks like just one month after they split, the couple are well and truly back on again. Cameron, 38, and A-Rod (real name Alex Rodriguez), 35, spent the afternoon on a boat yesterday in Miami Beach.

On again! Cameron Diaz and A-Rod relaxed on a boat in Miami Beach yesterday

And it was clear there's plenty of mutual attraction afoot as they lay side by side in the sun. Wearing a tiny black bikini and white hat, Cameron showed her taut, toned figure off to perfection. Meanwhile A-Rod chose to go shirtless as he tried to shield the blonde actress from photographers.

Alright darling? Cameron keeps an eye on A-Rod as they sun themselves

Despite their reluctance to be pictured together, it's clear their on-again-off-again romance is back on track. The couple were spotted leaving a gym together in South Beach, Miami yesterday. And just last week the couple were spotted having a very intimate dinner at a members-only West Hollywood restaurant. According to an onlooker, the couple couldn't keep their hands off each other.

Relax! Cameron lays back in her tiny black bikini while A-Rod snuggles close'

They looked super couple-y,' a source tells Us Weekly magazine. 'Cameron was holding his hand and nuzzling him.' Judging by their history though, it doesn't seem as if it will be long before they split again. A source close to A-Rod says: 'They break up and get back together all the time.'

Cameron and A-Rod have reunited after breaking up a month ago

But it looks like this time round, the Yankees star regrets breaking up with Cameron back in October and begged to have her back. 'He cut things off from her and she was really hurt,' a source tells Hollywoodlife. 'She wasn’t looking to get married or anything, but Alex has a wandering eye and wanted to see other people. 'But, he missed her. Cameron is really a lot of fun and Alex always had a good time with her.'

Cameron and A-Rod were also spotted leaving a Miami gym'

He called her and asked her to get together and at first Cameron said, "no," But after a long conversation he finally convinced her to meet with him. For now, it looks like all is forgiven.'

Meanwhile the release of Cameron's new movie with ex-boyfriend Justin Timberlake has been pushed back to June 17.

Summer audiences want movies that will make them laugh out loud and we think Bad Teacher is the perfect choice for older teens and adults who are looking for a film that will make them look at the high school experience and do just that,' says Jeff Blake, chairman of Worldwide Marketing and Distribution for Sony Pictures.

It's on! Cameron Diaz and A-Rod were seen leaving a gym together in Miami yesterday