Courteney Cox rang in her 59th birthday with Jennifer Anniston on Friday as they headed out to Soho House in Malibu. 

The actress marked her special day with a low-key affair at the Californian private members club, surrounded by her close pals. 

She looked as youthful as ever with her dark hair styled in voluminous waves and a pair of oversized blue aviator sunglasses. 

Courtney topped off her look with a denim jacket which was layered over a plunging black top. 

Following closely behind, Jennifer, 54, attempted to fly under-the-radar, shielding her face from view as she departed the venue. 

Celebrating: Courteney Cox rang in her 59th birthday with Jennifer Anniston on Friday as they headed out to Soho House in Malibu

Low-key: Following closely behind, Jennifer, 54, attempted to fly under-the-radar, shielding her face from view as she departed the venue

The Friends co-stars were joined by fellow actress Mary McCormack, who looked stylish in a tweed blazer. 

The outing comes after Jennifer admitted she loves a 'cheat day' and will sip on a dirty martini cocktail when the mood takes her.

Jennifer committed to a healthy and holistic lifestyle and follows a high-protein, low-carb and low-sugar diet.

She pairs that with a five days a week workout regime which is cardio intense, whilst she also attends 10-to-20 minute Pvolve classes. 

Pvolve is a science-led workout method that combines low-impact functional fitness with resistance-based equipment.

However, Aniston will reward herself with cheat days when she wants to enjoy her favourite foods and drinks, and her alcoholic tipple of choice is the martini mix, which is made with gin and vermouth and garnished with an olive or a lemon twist.

A source told Us Weekly magazine: 'Jen's meals are rich in protein with a healthy amount of carbs, and she also indulges in treats and cheat days. 

'If she wants to enjoy a dirty martini or tequila, she'll splurge. It's no big deal.'

Girls night: The Friends co-stars were joined by fellow actress Mary McCormack, who looked stylish in a tweed blazer

When it comes to relaxing, The Morning Show star practices meditation and makes sure she gets plenty of fresh air with her pet dogs.

The source added: 'She meditates, and loves hikes with her dogs.'

Jen is said to not be worried about ageing and has no interest in cosmetic procedures and instead wants to focus on being 'healthy and happy' as she continues to grow as a woman.

The insider spilled: 'Jen feels fine about getting older. For her, it's about being healthy and happy as she can be.'