The cast of Todd Phillips's "Joker" movie is coming together, and just in time, too.

The Joaquin Phoenix-starring film has reportedly added another high-profile actor. Multi-Emmy winner Alec Baldwin has joined as Thomas Wayne, Batman's father, according to Deadline. Warner Bros. hasn't confirmed the casting, but sources close to the project have shared the news, TheWrap reports.

Filming is supposed to start Sept. 10, so it sounds like Baldwin will be getting to work soon. His role is a supporting one and it puts him alongside other big names, including Robert De Niro, Frances Conroy, Marc Maron, and Zazie Beetz. Phoenix will play the titular character, but so far, plot details have not been revealed. It has been cryptically described as a "gritty character study" and a crime drama.

As Thomas Wayne, Baldwin will portray the father of Bruce Wayne, also known as Batman. The character sadly meets a tragic end in the comics, but we don't know if that will be the case in "Joker." If so, we just hope Baldwin gets some quality screen time first. You can't kill off an Oscar nominee's character right away, right?

The "Joker" movie is slated to open Oct. 4, 2019.

[via: Deadline; TheWrap]