Jennifer Aniston, David Schwimmer and Lisa Kudrow add their own tributes to their former Friends co-star Matthew Perry

She played the character of Rachel on the show about six close-knit friends navigating adult life in New York.

“He was such a part of our DNA. We were always the six of us. This was a chosen family that forever changed the course of who we were and

what our path was going to be,” Aniston wrote on Instagram.

She accompanied her post with a screenshot of a text message she received from Perry, in which he wrote: “Making you laugh made my day.”

“It says it all,” Aniston said.

Schwimmer, who played Ross on the show, posted a favourite photo of himself and Perry, adding: “Now it makes me smile and grieve at the same time.”

“Thank you for ten incredible years of laughter and creativity,” he wrote.

Perry was found unconscious in a hot tub at his house in Los Angeles last month. First responders were unable to revive him.

The cause of Perry’s death is not yet known. An initial post-mortem examination was inconclusive, and the results of toxicology tests have not yet been released.