AceShowbiz -

A major character of "Grey's Anatomy" is heading to the show's upcoming firefighter-focused spin-off. Jason George, who plays Dr. Ben Warren, will be joining leading lady Jaina Lee Ortiz on the forthcoming new series.

According to The Hollywood Reporter, how exactly Warren moves from "Grey's Anatomy" to the spin-off is currently kept tightly under wraps. It seems like it will be the key part of his storyline in the upcoming 14th season of the ABC medical drama.

George will remain as a series regular on "Grey's Anatomy" until the spin-off kicks off its production. The site further suggests that moving to the second offshot of "Grey's Anatomy" will not stop him from popping in and out on the flagship series.

George joined "Grey's Anatomy" as a recurring character back in season 6. His character, Warren, was later married to original series star Chandra Wilson's Miranda Bailey. George was promoted to a full-fledged series regular in season 12.

In season 13 finale of "Grey's Anatomy", Warren went full firefighter mode as he tried to save Stephanie (Jerrika Hinton). Goerge's casting news came after ABC originally planned for an entirely new cast for the spin-off.

The untitled spin-off follows the group of heroic firefighters in a Seattle firehouse. The first episode of the series will be launched as a planted spin-off and air as part of an episode of ABC's long-running medical drama. The lead characters will be introduced in the episode before the spin-off launches in midseason.

The new series hails from "Grey's Anatomy" showrunner Stacy McKee, who also serves as executive producer alongside Shonda Rhimes and Betsy Beers. McKee will also write the script.

The 10-episode spin-off marks the second show spinning off "Grey's Anatomy". Previously, ABC aired another "Grey's" spin-off, "Private Practice", which revolves around Kate Walsh's character, Dr. Addison Montgomery. The show ran for six seasons from 2007 to 2013.