Barry Keoghan joins Cillian Murphy’s ‘Peaky Blinders’ movie — How did it take so long?!

He’s got a red right hand. 

Barry Keoghan has joined the cast of the “Peaky Blinders” movie. The Irish actor, 31, is best known for his raunchy role in “Saltburn” and for his Oscar-nominated performance in “The Banshees of Inisherin.” 

And, he’s also known for formerly being romantically linked with pop star Sabrina Carpenter.

The hit British gangster drama, which streams on Netflix, ended in 2022 after six seasons. 

Earlier this summer, Netflix confirmed that series star, Oscar winner Cillian Murphy, would return for the movie, written by series creator Steven Knight. 

The show follows Tommy Shelby (Murphy), a gangster in post World War I Birmingham, England. 

The term “peaky blinders” refers to the caps, worn by the Shelby men, which have razor blades stitched into their brims — used to blind or maim enemies. 

Many big stars have played Tommy’s allies or enemies in the show, including Tom Hardy, Sam Neil, “The Hunger Games” star Sam Claflin, and “House of the Dragon” star Paddy Considine. 

Details of Keoghan’s role have not been announced. 

“It’s nuts,” Murphy told The Post in 2018. 

“I’m just constantly surprised how [‘Peaky Blinders’] continues to grow. Sometimes with these longform shows they tend to plateau, or dip, for a season, but ‘Peaky’ seems to have incrementally gotten stronger and I’m really proud of that. It’s a testament to [writer/creator] Steven Knight.”

The show boasts several celebrity fans, including Snoop Dogg, Brad Pitt, Tom Cruise and David Beckham. 

“We get a lot of people who get in touch and want to take part,” Knight told the Guardian in 2019. 

“There’s Brad Pitt. Snoop Dogg. A$AP Rocky, too. I think in Series 6 we will open the door a little to get some celebrity actors in. The main thing is they have to be good. We’ll just get the best actor for the part, as we did with Sam Claflin.”

“We watch ‘Peaky Blinders’ all the time—and dress like that every day,” Brooklyn Beckham said in 2019. 

About the show’s popularity, Murphy told The Post that it caught on “like some sort of osmosis. When the second [season] came along it got into that zeitgeist-y kind of thing and by the third [season] people were walking around dressing as Peaky Blinders and getting the haircuts and listening to the [soundtrack] music.”

Murphy, who most recently won an Oscar for “Oppenheimer,” continued, “When people meet me in the public arena they’re terribly disappointed. I’m not moody and distant like Tommy … and I think people are genuinely underwhelmed when I’m such an unremarkable person in real life — but I’m quite happy about that.”

A premiere date for the movie has not been announced.