Oscar-nominated star Michael Keaton dug out his signature cape and cowl from his closet as the actor is all set to reprise the role of the caped crusader of the fictional Gotham City, for the upcoming HBO Max superhero movie "Batgirl."

The 70-year-old actor will be starring alongside Leslie Grace who plays Barbara Gordon, daughter of Gotham police commissioner Jim Gordon, played by J.K. Simmons. Brendan Fraser portrays the villainous Firefly, a sociopath with a passion for pyrotechnics.

Though the plot of the movie is kept under wraps, it is known that it centers around Barbara who is Gotham’s new "Batgirl."

Currently under production in London, "Bad Boys for Life" filmmakers Adil El Arbi and Bilall Fallah are helming the venture for Warner Bros. Christina Hodson ("Bumblebee," "The Flash") is writing the screenplay.

There has been no statement from Warner Bros yet but the news comes following the announcement that Keaton would return as "Batman" for Ezra Miller-starrer "The Flash," which is scheduled for release on November 4, 2022.

So far, "Batgirl" does not have an exact release date yet, though the movie is scheduled to debut on HBO Max in 2022. The same year, Keaton will also be seen as the caped crusader in "The Flash."

The fact that Ben Affleck will also be starring in the film, as Batman, has left fans curious.

Keaton previously donned the Batsuit in Tim Burton’s 1989 "Batman" and again in 1992’s "Batman Returns." Back in August, the actor appeared on the cover of The Hollywood Reporter where he talked about returning to the DCU in "The Flash."

"I had to read [the script] more than three times to go, 'Wait, how does this work?'" Keaton admitted when discussing "The Flash," which sees the return of Miller as the fast-moving superhero, Barry Allen, as he travels through parallel universes and meets different iterations of DC's classic superheroes. "They had to explain that to me several times," added Keaton.

He said he was very excited to play Batman again because of what that character means to fans.

"What's really interesting is how much more I got [Batman] when I went back and did him," he said. "I get this on a whole other level now. I totally respect it. I respect what people are trying to make. I never looked at it like, 'Oh, this is just a silly thing.' It was not a silly thing when I did Batman. But it has become a giant thing, culturally. It's iconic. So I have even more respect for it because what do I know? This is a big deal in the world to people. You've got to honor that and be respectful of that. Even I go, 'Jesus, this is huge.'"

22 Michael Keaton - Getty Images
Once makeup artist Ve Neill settled on the title character’s dark eyes, green hair and large false teeth, she told Yahoo News, Keaton “just completely started going off, crazy-like." She won the Academy Award for Best Makeup for her work. Getty Images