Hollywood stars Jennifer Aniston and  Gerard Butler enjoyed a romantic holiday by jetting off to Mexico  together, says The Mail, London.

Aniston, who turns 41 on Thursday, has flown to Cabo San Lucas in Mexico with the Scottish star along with close friends Courteney Cox and Sheryl Crow to celebrate her birthday.

The A-list group looked to be having a fabulous time together as they were pictured sunbathing by the pool.

Aniston, who was donning a mismatched brown and pink bikini, chatted happily with  Cox and  Crow while Butler relaxed on a sunlounger in light blue shorts.

Rumours that the pair are enjoying a romance have been growing since they attended the Golden Globes together in January.



They put on an affectionate show on the red carpet, hugging and posing for pictures together.

Sources at the event even said they were seen kissing at the show's after-party.

According to US reports, the couple were being so overt with their canoodling that event organisers were gossiping about it on their walkie-talkies.

They were then pictured gazing into each other’s eyes at the Hope for Haiti Now appeal in the U.S shortly afterwards.

The twosome first became close when filming forthcoming movie The Bounty Hunter together last summer.

According to film experts, the sexual chemistry between the pair is obvious in the film.

And they share some intimate on-screen moments. In one scene, Aniston even straddles her co-star while handcuffed to a bed.

The pair were rumoured to have been involved in an off-screen tryst while filming the flick, with a source claiming they enjoyed kisses between scenes and spent free time in Aniston’s trailer.  But, at the time, Butler insisted they were just friends.