Jennifer Aniston has joined Instagram, posted one picture and attracted almost 5 million followers in 12 hours.
The picture in question was a selfie, which appears to have been taken by Aniston herself, with five of her friends gathered around her.
The reason it sent the internet into meltdown was the identity of the five friends — it was her fellow Friends cast members Lisa Kudrow, Courteney Cox, Matt LeBlanc, David Schwimmer and Matthew Perry.
"And now we're Instagram FRIENDS too. HI INSTAGRAM," wrote Aniston as the photo caption, drawing attention to the fact the cast of the popular sitcom, which originally ran from 1994 to 2004, had reunited for the photo, and were also friends in real life.
Celebrities and regular Instagram users went wild about the post.
"I'm glad they're still there for you," wrote talk show host Ellen DeGeneres, riffing on the lyrics of the show's theme song.
"What a smart first pic and caption," wrote Marianna Hewitt, an Insta-famous entrepreneur.
Reese Witherspoon, who in unrelated news is set to appear alongside Aniston in a new series called The Morning Show — Aniston's first real foray into television since Friends ended 15 years ago — was one of the first to comment, enthusing: "YASSSS!!! Welcome to Insta Jen!!!"
"Can we be friends?" joked Burger King.
"My life is complete," said one poster, while another gushed, "EPIC!!!! Love this so much!!!"
One person expressed utter disbelief, either at the fact Aniston had joined the platform or that she had decided to assemble her fellow actors and photograph them together. "WHAAAAAAA!!!?!??" he wrote.
Many other instagrammers chose to express their joy using just emojis, perhaps because they wanted to get their comments up as quickly as possible, or perhaps they were just too excited to type words.
In a flurry of activity on the social media platform, Aniston also put up a profile pic, which is of her holding her hands to her face in a "surprised" expression, and added a bio: "My friends call me Jen". There's that word again.
She did not "tag" her friends in the photo. Being a new user, she may not be aware of that function yet.
The 50-year-old actress, who has enjoyed a successful post-Friends career in which she has carved a niche as a mainstay in romantic comedies, also followed just over 100 accounts on "the gram".
Those included Time magazine, Maria Sharapova, Pharrell Williams, Dolly Parton, Nicole Kidman, Tom Ford and her ex-husband, Justin Theroux.
The first four people she followed, of course, were her best friends forever Cox, Kudrow, LeBlanc and Schwimmer.
Perry, who played Chandler Bing in the series, does not currently have an Instagram account, allaying any fears of a rift.