Jennifer Aniston has rung in her 49th birthday with a lowkey bash in Malibu.

Jennifer Aniston's birthday bash via Instagram (c)

Jennifer Aniston's birthday bash via Instagram (c)

The 'Friends' actress joined some very special friends on Monday (12.02.18) to celebrate her birthday - which was a day earlier on February 11 - including her former co-star on the hit sitcom Courteney Cox, who hosted the exclusive bash at her Malibu home.

Jennifer's pals all gathered together for a group photo to commemorate the special day, and several of them took to Instagram to share the snap afterwards.

Her manager, Aleen Keshishian, captioned the shot: "#happybirthday to my sister from another mother #jenniferaniston [love] u so much! (sic)"

Whilst actress Mandy Ingber shared the same photo and wrote: "Thanks @aleenkeshishian for posting this shot of these incredible women. We love our Jen. magical Malibu day. I love that this is taken by the kiddos!"

Fellow actress Andrea Bendewald, who was also amongst the guests at the gathering, took to Instagram earlier in the day to share a throwback photo of herself with Jennifer.

She wrote: "Happy Birthday to my best friend, twin from another mother, soul sister of the ages. Friends since we were 14 and still growing and learning together. You make the world a better place and life so much more enjoyable and a fun ride. Grateful for you everyday and in every way. #bestfriend #forever (sic)"

Jennifer's bash comes just days after the 'We're The Millers' actress attended Ellen Degeneres' star-studded 60th birthday bash on Saturday (10.02.18), which was a slightly more extravagant affair.

Ellen - who turned 60 on January 26 - welcomed the likes of Kim Kardashian and Kanye West, John Legend and Chrissy Teigen, Olivia Munn, Jennifer Lopez, Meghan Trainor, and a host of other famous faces.

Jamie Foxx showed up with a bottle of champagne for a special toast in honour of the talk show host, while Chance the Rapper surprised Ellen with some flowers.