Following the passing of their "Friends" co-star Matthew Perry last month, Courteney Cox and Matt LeBlanc have each offered their first individual tributes to him.Cox, who portrayed Perry's on-screen wife Monica, posted an Instagram video of herself with Perry's character Chandler, saying she was "so grateful for every moment" they worked together, reports the BBC. ‘In time we will say more’: Friends stars say after Matthew Perry’s deathLeBlanc, who portrayed Joey, was the first to pay tribute."It was an honour to call you my friend," he wrote."It is with a heavy heart I say goodbye. I'll never forget you," said LeBlanc. Matthew Perry, Emmy-nominated 'Friends' star, dead at 54Perry, 54, was found dead in his Los Angeles home last month, sparking an outpouring of grief from fans from all over the world.In a joint statement last month, Cox and LeBlanc along with Jennifer Aniston, Lisa Kudrow, and David Schwimmer described Perry's death as an "unfathomable loss". Chandler Bing, the AI chatbot: A tribute to Matthew Perry’s ‘Friends’ characterFollowing his issues with alcohol and drugs, a new foundation has been established in Perry's honour, vowing to continue his dedication to helping others struggling with addiction.