Cox captioned the photo of the trio 'a rare night and I love it'. This photo follows a number of other photos that have sparked rumours of a reunion.

Sparking more rumours 

Earlier this year, former Friends co-stars Aniston, Cox and Kudrow also got together for a girls' night, amongst other meetings that the cast have had. All the regular meet-ups have sparked rumours of a possible reunion. Additionally, the fact that nearly all of the Friends cast posted a photo celebrating 25 years since the show began has also raised suspicions. 

In June Aniston featured on The Ellen DeGeneres Show and was asked about a Friends reunion. Aniston replied with: "Listen, I told you this. I would do it… The girls would do it, and the boys would do it, I'm sure. Listen, anything can happen."