Courteney Cox proves her and Jennifer Aniston are 'friendship goals' as she marks 50th birthday

Courteney Cox proved her and Jennifer Aniston are friendship goals as they celebrated Aniston's 50th birthday.

Cox paid tribute to her close friend as she marked her big birthday with a snap of the two actresses, who played Monica Geller and Rachel Green in the hit sitcom.

Cox wrote: “The world definitely got brighter the day this girl was born. Happy birthday sweetheart! I Love you.”

Fans rushed to comment on the snap, branding the pair “friendship goals” and declaring “Rachel and Monica forever”.

One wrote: “This friendship is everything!” accompanied by a series of heart and smiley emojis.

Another said: “2 inspiring beauties. Happy Birthday Jen. You both are wonderful.”

“The one where Rachel turns 50. Happy birthday,” posted somebody else making reference to the comedy’s episode naming format.

Others described the post as “too much” as they had the ultimate fangirl moment of the mini Friends reunion.

Aniston’s ex-husband Justin Theroux was also among those to wish her a happy birthday, with the post coming more than a year after they split up .

The 47-year-old actor posted a black and white photo of the Friends star carrying an animal horn above her head, and wrote: “Happy Birthday to this fierce woman.”

“Fiercely loving, fiercely kind… and fiercely funny,” he continued, before concluding the post with: “[Love] you B.”

Theroux’s Instagram followers went wild for the heartfelt post, describing it as “sweet” and “classy” and praising the stars for their “maturity” and “respect.”

Aniston and Cox starred opposite Lisa Kudrow, Matt LeBlanc, Matthew Perry and David Schwimmer in the popular American comedy which spanned 10 seasons over its decade-long run.