John Mayer Writes Song For Jennifer Aniston

Crooner John Mayer has a written a song about new girlfriend Jennifer Aniston.

The 'No Such Thing' hitmaker, who is currently on tour, apparently penned the song 'Moonbeam' about his love for the former Friends star.

The pair started dating earlier this year and are said to be taking things slowly having both had difficult break-ups in the past.

Jennifer, 39, is said to have already introduced John to close friends -- including Courteney Cox and her husband David Arquette -- and family before following him to London for the UK leg of his tour.

Mayer, 30, was recently reported to be suffering from a case of writer's block, but it looks like Jen has put an end to that, and is planning to release the romantic song soon.