“I am so grateful for every moment I had with you Matty and I miss you every day,” she wrote via Instagram on Nov. 14.
“When you work with someone as closely as I did with Matthew, there are thousands of moments I wish I could share. For now here’s one of my favorites.”
“To give a little backstory, Chandler and Monica were supposed to have a one night fling in London. But because of the audience’s reaction, it became the beginning of their love story,” she continued, captioning a photo of the pair from the 2001 episode. “In this scene, before we started rolling, he whispered a funny line for me to say. He often did things like that. He was funny and he was kind.”
Cox’s tribute came just hours after Matthew LeBlanc shared his own on social media.
He was best known for his role as Chandler Bing, the affable neighbor-turned-husband of Cox’s Monica Geller on “Friends.”
Cox, 59, shared a special bond with Perry off-screen as well, with the pair making guest appearances on each other’s sitcoms after “Friends” wrapped its 10-season run in 2004.
“She is fantastic, obviously. And my desire to show off in front of her is back in full swing,” Perry tweeted in February 2013 as Cox guest starred on his NBC sitcom “Go On.”
Perry returned the favor months later, when he appeared on Cox’s comedy “Cougar Town.”
“It was so great to work with him. He’s so sweet,” Cox said on “Conan” in January 2014, per US Weekly.
“When I worked with him on ‘Friends,’ he literally gave me my personality for 10 years,” she added.
Perry weighed in on his “Friends” cast friendships to Buzzfeed in 2015.
“We try to get together when we can,” he said at the time. “Courteney is a great host, and she has a nice place in Malibu, and we try to go out there as often as possible. But the six of us haven’t been in a room together for a number of years.”
In November 2019, Cox shared a selfie of herself and Perry via Instagram.
“Guess who I had lunch with today … I KNOW!! Could I BE any happier?” she captioned the post, referencing their iconic catchphrases on “Friends.”
The cast of the hit show reunited in 2021, with Cox saying she thought Monica and Chandler would still be married.
The fictional couple tied the knot in 2001.
“I think my character, Monica, is still really competitive,” Cox opined at the reunion.
“And you are making me laugh every day,” she said of the jokester Chandler.
And months before Perry released his 2022 memoir — “Friends, Lovers and the Big Terrible Thing,” which explored his drug and alcohol addiction — Cox gave an update on her beloved co-star.
“He’s just struggled for a while. I think he’s doing great now,” she told The Times of London in February 2022.
Cox — alongside co-stars Jennifer Aniston, Lisa Kudrow, LeBlanc and David Schwimmer — attended Perry’s funeral service in LA on Nov. 8.
The Post reached out to Cox’s reps for comment.