Nathan Fillion is voicing Guy Gardner in the animated Mister Miracle series at DC Studios, and the news came from showrunner Tom King himself rather than a studio press release.
King revealed the casting during an interview with Entertainment Weekly, framing it as an easy fit despite the gulf between a hard-edged Green Lantern drama and an adult animated adaptation of one of the most emotionally raw superhero comics of the last decade. King said they brought Fillion into the Mister Miracle show and that he brings that energy to every aspect of it. You would expect it to clash tonally, King said, but “it blends because that’s who Guy is. He’s that guy who is over the top.” Everyone knows someone a little like that, he added.
That last part is the whole reason Guy works in a story this heavy. Mister Miracle is about Scott Free trying to hold his marriage and his mind together while Apokolips and New Genesis grind each other into dust. Dropping the loudest, least self-aware man in the Green Lantern Corps into that is less a tonal break than a pressure valve.
What This Says About the DCU
Mister Miracle was greenlit in June 2025 at the Annecy International Animation Festival as the second adult animated series from Warner Bros. Animation and DC Studios, following Creature Commandos. King serves as showrunner and executive producer on the adaptation of his and Mitch Gerads’ Eisner-winning 12-issue run. James Gunn confirmed in January 2026 that the series is DCU canon, not a standalone Elseworlds project, and King said in late July that it will air in 2027.
Fillion’s casting is the first concrete proof of a policy Gunn has stated repeatedly, which is that animated voice roles in the DCU will match their live-action counterparts. That makes the animated slate an extension of the same continuity rather than a parallel track, and it means casting announcements for Scott Free, Big Barda, and Darkseid carry real weight for the wider universe. King has already teased that those roles are locked and that more announcements are coming.
The practical effect is that Guy Gardner is now one of the most-used characters in the entire DCU. He debuted in Superman in 2025, turned up in Peacemaker season two, appears in Lanterns, and is now crossing into animation. Very few characters in either the DC or Marvel side of things have that kind of reach this early in a universe’s life.
Guy Gardner in Lanterns
Fillion’s Guy also has a role in Lanterns, the HBO series that takes a grounded, crime-drama approach to the Corps. Aaron Pierre plays new recruit John Stewart and Kyle Chandler plays Hal Jordan, with the two working a murder investigation in the American heartland. Chris Mundy showruns, with King and Damon Lindelof co-writing and executive producing.
Guy’s presence there has been the subject of a lot of speculation precisely because the show is pitched so much darker than the character usually plays. Gunn had originally described a few other Lanterns being peppered throughout, and Fillion was the first one confirmed. King’s Mister Miracle comments are the clearest read yet on how he thinks the character functions across both projects, which is that Guy does not adapt to the tone of a room, he changes it.
There is also a long history behind Guy’s presence in Lanterns. In the show’s earliest development, back when it was a Berlanti production announced alongside Strange Adventures in 2019, Guy Gardner was going to be a lead. That version placed him in 1984 as an embodiment of hyper-patriotism, with Finn Wittrock cast in the role, alongside a 1941 storyline for Alan Scott. The Discovery merger and the formation of DC Studios wiped that version out and refocused the series on John Stewart. Fillion’s Guy arriving in the finished show is something of a homecoming for the character.
The Hal Jordan Years
The wrinkle longtime DC animation fans will appreciate is that Fillion spent more than a decade voicing a different Green Lantern entirely.
He first played Hal Jordan in 2011’s Green Lantern: Emerald Knights, then returned to the role in Justice League: Doom in 2012, Justice League: The Flashpoint Paradox in 2013, Justice League: Throne of Atlantis in 2015, The Death of Superman in 2018, and Reign of the Supermen in 2019. For most of the 2010s, Fillion was the definitive animated Hal Jordan, and fans had long assumed he would eventually get the live-action version of the role.
Gunn went the other way and cast him as Guy, the Lantern Hal barely tolerates. Fillion has said he took his approach to the character from Estelle Getty’s Sophia on The Golden Girls, someone with no filter who simply says whatever occurs to her. He has also described Guy as fearless rather than good, which is the entire loophole that lets a jerk carry a power ring in the first place.
So Fillion is now returning to DC animation in the exact medium where he built his Green Lantern reputation, playing the Lantern nobody wants to call. Hal Jordan is being voiced by someone else in this continuity, and Fillion is the guy in the room being obnoxious about it.
One more piece of comics trivia worth noting: King famously killed Guy Gardner in his Human Target miniseries, where the character was written as an obsessive ex who gets frozen and shattered. Him personally recruiting Fillion’s Guy into his own animated series is a turn readers of that book will enjoy.
A platform for Mister Miracle still has not been formally announced, though HBO Max remains the widely expected home. King has said additional casting news is coming.
Sources: Entertainment Weekly | Bleeding Cool | DC | Variety | GeekFreaksPodcast.com
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