The core cast of Jennifer Aniston, Courteney Cox, Lisa Kudrow, Matt LeBlanc, Schwimmer and Matthew Perry will be part of the one-off event, which will be shot on the iconic Stage 24 of the Warner Bros Studio lot in Burbank, California where the original NBC series was filmed.
New York-based Schwimmer, who played Ross Gellar in the hit comedy show, said the cast will start shooting around April.
"It''s happening. Actually, in a little over a month I''m heading out to LA," the 54-year-old actor said on SiriusXM''s "Radio Andy" on Wednesday.
"So, finally, I mean, we figured out a way to film it safely and there''s going to be a portion of it that we filmed outside because of, you know, for safety protocols," Schwimmer added.
In November, Perry said the reunion had been rescheduled to film in March.
The event has now been delayed multiple times due to the ongoing coronavirus pandemic. HBO Max, WarnerMedia''s streaming platform, had officially ordered the special in February 2020.
Ben Winston will direct and executive produce alongside "Friends" creators David Crane and Marta Kauffman and Kevin Bright.
"Friends" premiered in September 1994 and was a phenomenon during its decade-long run.
It later went on to find cult status among new audiences through TV reruns and streamers.