Nearly three weeks after the actor's tragic passing, Aniston penned a message to her "little brother."
"Oh boy this one has cut deep," Aniston—who portrayed character Rachel Green on Friends alongside Perry's Chandler Bing—began her Nov. 15 Instagram post. "Having to say goodbye to our Matty has been an insane wave of emotions that I've never experienced before."
Aniston added that Perry was a part of their DNA. "We were always the 6 of us," she noted, referring to Perry and fellow Friends stars Courteney Cox, Lisa Kudrow, Matt LeBlanc and David Schwimmer. "This was a chosen family that forever changed the course of who we were and what our path was going to be."
Since Perry's passing on Oct. 28, Aniston has been looking back on her texts with the Fools Rush In star.
"Laughing and crying then laughing again," she wrote. "I'll keep them forever and ever. I found one text that he sent me out of nowhere one day. It says it all."
The text, which Aniston shared a screenshot of on Instagram, included a photo of her and Perry smiling on the set of Friends. "Making you laugh just made my day," he wrote to Aniston under the photo. "It just made my day."
She replied, "Awww the first of THOUSANDS of times."
The Morning Show actress concluded her note with a message to her Matty.
"I love you so much and I know you are now completely at peace and out of any pain," she wrote. "I talk to you every day… sometimes I can almost hear you saying 'could you BE any crazier?'. Rest little brother. You always made my day…"
Keep reading to see more heartfelt tributes to Perry...