Jennifer Aniston's burgeoning romance with singer John Mayer must be getting serious - she's introduced him to her best friend Courteney Cox.

The 39-year-old actress' relationship with Mayer, 30, was made public last month when the pair were photographed cuddling by a pool in Miami, where Aniston has been filming her new movie Marley & Me with Owen Wilson.

After taking their cross-State romance from Miami to New York, Aniston and Mayer made their Los Angeles debut as a couple with a laid-back romantic weekend.

On Sunday, Mayer drove his new girlfriend to the beachside Malibu home of her closest pal and ex-Friends co-star Cox and her husband David Arquette for an evening dinner.

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Meet the friends: Jennifer Aniston and John Mayer drive to Courteney Cox's beachside home in Malibu

Complimenting her new boyfriend's laid back style, Aniston sported a white vest and blue cardigan with sunglasses as they enjoyed the sunny day.

Cox, 43, is said to be very protective of Aniston, who she supported following her high-profile marriage split with Brad Pitt in 2005.

The Dirt actress was rumoured to have disapproved of Aniston's last long-term boyfriend Vince Vaughn, who she dated for 18 months before splitting in December 2006.

On Saturday night, Aniston and Mayer enjoyed an intimate meal at the exclusive Polo Lounge at the Beverly Hills Hotel, before the tattooed rocker drove them home to the actress' mansion in the Hollywood hills.

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In the love seat: A relaxed Jennifer Aniston puts her feet up on the glovebox as John Mayer drive to their dinner date for four

The following day, Mayer took the steering wheel again as they rode in his Porsche Cayenne Turbo to the Cox-Arquettes' gated beachside home, where they live with their young daughter Coco, who is Aniston's goddaughter.

Ahead of Aniston's introduction of Mayer to Cox yesterday, a friend told U.S. magazine National Enquirer: 'John's a bit uneasy about it - it's like meeting your lover's mom for the first time. Jen laughs and tells him Courteney just wants to pinch and poke the product.

'Courteney guards Jen like a mother hen. Jen just smiles and reminds her pal she's met John on several occasions - but Courteney comes right back with: "Yeah, but you weren't sleeping with him then."'

Despite their relationship only being known a month, the New York Post reported last week the couple had been dating for three months, but only decided to appear in public recently when it started to get serious.

Singer/songwriter Mayer has previously dated actress Jennifer Love Hewitt and singer/reality TV star Jessica Simpson.

Skimpy: Jennifer Aniston walks to her new boyfriend's Porsche in a revealing white vest