The director says he’s already thinking of collaborating with Miller again.
"I don’t think there’s anyone that can play that character as well as they did," he said.
"The other depictions of the character are great, but this particular vision of the character, they just excelled in doing it ... It feels like a character that was made for them."
The long-gestating Flash movie will finally premiere next week. The film follows Barry Allen’s (Miller) desperate attempts to change the events of the past using his super speed, only to end up altering the future.
Miller first starred as the DC Comics speedster in 2016 for Batman v. Superman: Dawn of Justice. They also appeared as the Flash in Suicide Squad and Justice League.
Principal photography for The Flash wrapped up in October 2021.
Producer Barbara Muschietti praised "brilliant" Miller for their commitment to the role and professionalism.
"Ezra gave everything for this role — physically, creatively, emotionally. They were absolutely supreme," Barbara Muschietti added.
In recent years leading up to the film’s release, Miller has been at the centre of several legal scandals and allegations.
Amid a major overhaul of Warner’s film division last year, Miller and their representatives reportedly met with bosses Michael De Luca and Pamela Abdy.
Miller reportedly expressed commitment to the action film and apologised for bringing negative buzz.
