“Happy Birthday Jenny Louise!” Cox wrote on Instagram. “We’ve known each other so long I don’t even remember why I call you that. I love you!” In case you’re wondering, Aniston’s actual middle name is Joanna, so that doesn’t explain it.ae0fcc31ae342fd3a1346ebb1f342fcb Cox and Aniston have been close ever since they started working on Friends in 1994. Read on to see more of the moments they’ve shared from their relationship over the years. And to find out one of Aniston’s nicknames from another friend, check out Jennifer Aniston Just Got a Sweet Birthday Wish From This Ex. Along with her birthday message, Cox posted a photo of herself and Aniston with her now-16-year-old daughter Coco when she was much younger. Cox also shared a second photo in which she and Aniston appear to be on a plane with Cox wearing a large straw hat. For more on Cox and Coco, check out David Arquette Has an Apology for His Daughter With Courteney Cox. Last year, Cox also wished Aniston a happy birthday on Instagram. That time, she posted a photo of herself dressing up as her buddy, wearing similar glasses holding a dark blonde wig on her head. “No matter how hard you might try… there’s only one Jennifer Aniston,” she wrote. “Happy birthday my dear friend @jenniferaniston! I love you!” Read more about Aniston with Jennifer Aniston Says This Was Her Most Embarrassing Moment. For Cox’s 56th birthday in June 2020, Aniston made four Instagram Story posts featuring photos of Cox and of the two of them together. “Happy birthday to this amazing human,” she wrote on one image. On another, she shared her nickname for Cox, writing, “I love you, CC.” The last post showed them in character as Rachel and Monica on Friends, painting each others’ nails. For more celebrity news delivered right to your inbox, sign up for our daily newsletter. In August 2020, Cox posted a video of herself and Aniston playing pool on Instagram. Cox plays masterfully, followed by a long montage of Aniston not being able to hit a single ball until the very end. Cox made a reference to one of Chandler’s famous lines from Friends in the caption, writing, “I may have had a good night…but could my friend BE any cuter?” For more on the beloved TV show, here’s The Embarrassing Friends Gaffe You Never Noticed Before. All of the Friends friends are still… friends, but Cox and Aniston post most frequently about hanging out with Lisa Kudrow, who played Phoebe. In January 2020, Aniston shared two photos of the three women together, and captioned it, “Hi from the girls across the hall.” For her birthday in 2019, Cox shared a photo of herself with the two actors and wrote, “How lucky am I to celebrate my birthday with these two??? I love you girls. So much.” For more a look back on Aniston’s career, Relive Jennifer Aniston’s Last 27 Years in Hollywood, in Photos.