Filming for the fourth season of "Arrow" is underway, and stars Paul Blackthorne (Quentin Lance) and David Ramsey (John Diggle) have taken to Instagram to show off one of the big changes in store for the show: Starling City is now Star City.

In the photo, Blackthorne shows off his prop badge, which reads "Star City Metro Police." Green Arrow fans will recognize the name from the comics, as Oliver Queen is originally from Star City. However, the name Star City was changed to Starling City for the first season of "Arrow." With this alteration, it seems like "Arrow" is headed back to its comic roots.

Stephen Amell (Oliver Queen) officially announced the change at this past Comic-Con International in San Diego, where he revealed that "Star City -- not Starling City -- still needs heroes." However, this is the first glimpse we've seen of that change in motion.

Don't mess with it. #ArrowSeason4 #Arrow @davidpaulramsey @david_ramsey A photo posted by Paul Blackthorne (@paulblackthorne) on

Starring Stephen Amell, David Ramsey and Emily Bett Rickards, "Arrow" season four is scheduled to debut Wednesday, Oct. 7 at 8 pm EST on The CW.