Amy shared an image of the two reunited BFFs on her Instagram page, and it looks like Woody Harrelson has joined the clique, too.
The three pals hung out on an outdoor patio, presumably in New York City, in the image, with the "Trainwreck" star wearing a white tank top and her hair pulled into a ponytail. J. Law, meanwhile, kept it simple in a black dress.
"Sisters," Amy captioned the snap.
Amy later shared an image of herself at Woody's stand-up gig at New York's Comedy Cellar.
"Magic," she captioned the photo.
Amy and J. Law first kicked off their friendship in 2015 and they quickly became everyone's favorite BFFs.
"I emailed her after I saw 'Trainwreck' and said, 'I don't know where to get started. I guess I should just say it: I'm in love with you,'" Jen told The New York Times in 2015. "We started emailing, and then emailing turned to texting."
Not long after that, the stars went on a summer vacation together with Amy's high school friends.
"So we go to the Hamptons, and Jennifer and I have become friends," Amy said on "The Daily Show." "And I was like, 'Oh, we're going on a boat tomorrow, you should come.' It was kind of hypothetical, and she was like, 'I think I'm coming,' and I was like, 'Oh my God.'"
Late last year, J. Law revealed that the two have written a comedy script together, in which they plan to costar.
"It's about two sisters who go on a road trip to try to connect with their brother," Jen said on "Watch What Happens Live." "The script is finished — we're both just trying to figure out our schedules."