Jennifer Aniston has told friends she’s in love with John Mayer.

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The former Friends actress began dating the Gravity singer last month and has confessed to pals she thinks he’s The One.

She reportedly said: “I think I’m in love!”

One friend told Star magazine: “Jen thinks John could be The One and that she has fallen for him – hard! She’s usually pretty cautious when it comes to dating but, with John, she has decided to follow her gut feelings.”

Jennifer – whose last serious relationship was with actor Vince Vaughn – also isn’t worried about John’s colourful past.

A source added: “She has heard all about his past and his womanising ways, but doesn’t see him like that.”

John has also admitted he is smitten with Jennifer.

A friend of the singer – who has previously been romantically linked to Cameron Diaz and Jessica Simpson – said: “He had become disillusioned with some of his earlier relationships, but he thinks Jennifer is gorgeous and he loves her sense of humour.”

The couple – who recently enjoyed a trip to New York – are now said to be planning a holiday to Mexico together.

A source said: “Jen and John definitely want to spend more time together. They both seem very interested in seeing where this goes.”