The actor, who has gained 6.5 million followers in under a day, made her debut on the platform with a photo of herself alongside Courteney Cox, Lisa Kudrow, Matt LeBlanc, David Schwimmer and Matthew Perry.
She captioned it: "And now we're Instagram FRIENDS too. HI INSTAGRAM."
The post attracted so much attention it temporarily crashed the page, which is now back up and running.
Fans have long awaited a cast reunion. September 2019 marked the 25th anniversary of the sitcom’s premiere.
A two-hour reunion TV special in 2016 featured just five of the six leads as Perry was unable to attend.
There have been partial Friends reunion photos over the past few years, but this is the first time in a long while that all six stars have posed together in the same picture.
As for a potential reunion episode, the cast and crew have so far suggested that it will not happen and that the sitcom is best left as it is.
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