Jennifer Aniston follows ex Justin Theroux as she joins Instagram with epic 'Friends' selfie

Welcome to Instagram, Jennifer Aniston!

The actress surprised everyone on Tuesday morning when comments from @jenniferaniston started popping up on her famous friends' accounts, and she confirmed that she had joined by posting a selfie with the rest of her "Friends" co-stars.

"And now we’re Instagram FRIENDS too. HI INSTAGRAM," she captioned a shot of her hanging out with Courteney Cox, Lisa Kudrow, Matt LeBlanc, David Schwimmer and Matthew Perry. The picture was seemingly from a reunion dinner that the cast had at Cox's house earlier this month.

Aniston joining makes Perry the only one of the show's main cast to not have an Instagram account.

The actress' surprise decision to join the social media platform comes just two days after she opened up to Entertainment Tonight about why she has held out from joining.

"What you resist, persists," she said. "It’s something that is a part of our world now and it’s not going away. … You can actually have a little bit more control over the narrative that’s out there. [You can] right some wrongs and some silly things that, God knows, are said often."

One of the most notable details of her arrival on Instagram, in addition to her cute bio that says "my friends call me Jen," comes from the 81 accounts she follows so far: In addition to celeb pals like Reese Witherspoon, Jimmy Kimmel and Chelsea Handler, Aniston also follows her ex-husband, Justin Theroux.

The pair hinted that they were friendly exes over the summer when Aniston seemingly appeared on Theroux's account as they mourned their shared dog at a funeral for their late pet.

Comments by Celebs appeared to be the first major account to notice that Aniston had joined Instagram on Tuesday morning, seeing that she commented on LeBlanc's post commemorating the 25th anniversary of "Friends," writing, "You don't have to # me anymore."

After the account screenshotted her comment and posted it on their page, Aniston was stunned, writing, "Wow you girls are fast."