Olivia Harvey
Updated Feb 12, 2020 @ 2:20 pm

Are we seeing double? Courteney Cox dressed up as Jennifer Aniston 2.0 to celebrate her BFF from way back on her birthday. And TBH, if Cox ever decides to do the whole dirty-blonde look, it’s going to be a major which witch is which situation.

In an Instagram post yesterday, Cox wished Aniston (the one on the right in the below photo, if you can’t tell) a happy birthday. Aniston turned 51 years old, and in honor of the occasion, Cox tried to morph herself into her friend by donning matching glasses and borrowing a sprig of Aniston’s hair. As David Spade said in the comments, “This is better than it should be. Good job.”

“No matter how hard you might try… there’s only one Jennifer Aniston,” Cox captioned her photo.

Reese Witherspoon reacted to the pic with several crying-laughing emojis, and Mindy Kaling wrote, “Hella cute.” Friend Derek Blasberg asked, “Omg! Can this be a challenge? #thejenchallenge?” Uh, count us in.

Aniston and Cox’s former Friends costar Lisa Kudrow also wished Aniston a happy birthday on Instagram.

“Always beautiful and keeps getting more beautiful,” Kudrow wrote in the caption. “Happy birthday @jenniferaniston I love you. Also, I JUST don’t know how to post a picture right.” It’s the thought that counts, Lisa.

And fellow Friends star Matthew Perry posted “Happy birthday, Jenny!!!” to his timeline, too.

We’re wishing Jennifer Aniston a very happy belated birthday, and thanks to Cox, #thejenchallenge is officially on.