After much speculation, the Dubliner has finally confirmed that he is playing the iconic character in the Matt Reeves flick.
In the credits for the film, Keoghan is listed as ‘Unseen Arkham Prisoner’, leading fans to conclude he was playing Joker in a deleted scene.
“So here is the JOKER and BATMAN scene from THE BATMAN,” he said, sharing a video of the scene to Instagram.
“Honestly I am stuck for words but I am very very BLESSED to play this role after the AMAZING AMAZING Actors before me. Here’s my version. Enjoy.”
The scene shows Batman, played by Robert Pattinson, visiting Joker behind bars at Arkham Asylum for help in identifying a serial killer.
He has remained tight-lipped about his role in the film. When asked by Ryan Tubridy if he was the Joker in the DC film he said: “I’m in it, you know I’m in it.
“I’m just going to cut this conversation now Ryan, yeah. I’m on the second last scene, go see it. It’s three hours long, it will be the best three hours of your life.”
Host Ryan quipped: “Do you know what you are, you’re a joker.”
Barry explained that he didn’t want to get in trouble by studio bosses: “I won't comment I won't say anything.
“You know, you want to keep that professionalism going forward. And for Marvel, DC, and every other project.”
The coveted role has previously been played by Jack Nicholson Heath Ledger, Jared Leto and most recently Joaquin Phoenix.