With American Horror Story, was recently cast as Guy, with other yet to be cast. While this will be the first time in the 21st century Guy is part of a live-action project like Green Lantern, Wittrock won't be the first actor to play him.
In 1997, CBS attempted to do a Justice League TV show, which would never be possible today, going as far as not even letting the Arrowverse meets Modern Family, The Office, or Parks and Recreation if the superheroes were being interviewed by a camera crew.
Matthew Settle played Guy in the '90s pilot as his depiction was one of the stranger aspects of the flopped show. What Justice League of America did with its iteration of Guy was essentially use his name only, while combining various traits of other Green Lanterns. Guy never wears a mask in his other depictions, for starters, but Settle's character on the show did with the disguise looking very much like Kyle Rayner in this incarnation. Settle's characterization is also tonally similar to Kyle, but also more in-line with Hal Jordan. Rather than being cocky and a loudmouth, Guy was surprisingly written and performed as very mild-mannered.
While Guy's profession before becoming a Green Lantern has changed in the comics, being a software salesman was not of them, which was the case in the CBS pilot. The only accurate thing about Settle's Green Lantern was that they incorporated Guy's sleeveless vest, but that was about it. Justice League of America also didn't do their Guy any favors with the poor VFX budget, making his energy constructs look incredibly cheesy. That was the first and last time Guy was ever portrayed in live-action, which is now being rectified with HBO Max's Green Lantern show.
Although, this take on Guy was only one of the big problems with the entire conception of the series. Following the late '90s take on the Green Lantern, Wittrock's depiction of Guy will be more accurate. HBO Max describes Wittrock's character as "a hulking mass of masculinity" while also representing "an embodiment of 1980s hyper-patriotism," but despite those qualities, there is something likable about Guy, per the casting. Unlike the CBS show, the new project will actually have high production value and writing that will tackle Guy more seriously. Green Lantern will be able to fix the errors that Justice League of America did with him in 1997.