Friends

The actor told US show Today he was diagnosed with an advanced form of the condition in 2018 which had spread to his bones.

Fans were left squealing with excitement after Cox, who played Monica Geller in the hit show, posted the video of her dancing with Ed Sheeran.

The special, which featured all six principal cast members of the iconic show, aired on Wednesday night in the US. Don't read on if you want to avoid spoilers!