Barry Keoghan’s appearance in the new Peaky Blinders project has given fans a great deal to discuss, but among the most persistent conversations is one that has been circulating in comment sections and on forums since the first trailer dropped: something about his accent sounds slightly different to what viewers expected. Rather than let that observation remain in the realm of uninformed internet opinion, an expert in accent and dialect has now weighed in with a clear explanation of exactly what is happening, and the answer is more interesting than most people anticipated.

The Observations That Sparked The Discussion

It started, as these things often do, with a clip. The moment Keoghan spoke on screen, a section of the Peaky Blinders fanbase began noting that his Birmingham accent sounded somewhat different from the delivery fans had become accustomed to from Cillian Murphy and the other long-standing cast members. The comment threads filled quickly. Some dismissed the observation as nitpicking. Others felt they were hearing something genuinely distinct, even if they could not articulate precisely what it was.

What The Expert Actually Said

The dialect expert who addressed the question explained that what viewers were noticing was not an error but a deliberate and technically accurate distinction. Keoghan is playing a different type of character from those at the centre of the original series, and the accent reflects that. The Birmingham accent is not a single monolithic sound but a family of related accents that vary significantly depending on class, neighbourhood, generation, and profession. A working-class character from one part of Birmingham in the 1920s would not sound identical to one from another, and the nuances are precisely what Keoghan and his dialect coach were aiming to capture.

Key Details

Barry Keoghan addresses divisive Peaky Blinders accent following movie release https://t.co/vOshKqLAXl pic.twitter.com/rTmiCLjZ0T

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Understanding The Birmingham Accent

The Birmingham accent, often called Brummie, is one of the most recognisable in England, and also one of the most misunderstood. It has historically been ranked poorly in surveys asking listeners to assess accent attractiveness, which has contributed to a cultural underestimation of its complexity. Linguists point to significant internal variation within the accent that most outsiders simply do not register. The vowel sounds, the rhythm, and the intonation patterns all shift depending on the speaker’s background, and it is these shifts that trained performers and dialect coaches spend considerable time working to reproduce accurately.

What You Need to Know

Why On-Screen Accents Are Never Straightforward

Dialect coaches who work on period dramas face a challenge that goes beyond simply learning how people speak today. Accents change over time, and spoken recordings from a century ago are scarce and often of poor quality. Coaches working on productions set in early twentieth-century England must piece together an approximation of period speech from historical records, written phonetic descriptions, and extrapolation from what is known about how accents have shifted since. The result is always an educated reconstruction rather than a perfect replica.

Barry Keoghan's 'abysmal' Peaky Blinders accent has been explained https://t.co/8Az5dIO3iP pic.twitter.com/k36euPYOMW

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The Impact

Keoghan’s Background And The Challenge He Faced

Keoghan is Irish, which adds another layer to the task. Unlike a performer whose native accent shares certain phonological features with the target, he was working from a very different base. Dialect coaches describe this kind of work as particularly intensive because the performer has to not only learn the target accent but actively suppress patterns deeply embedded in their own speech. The fact that viewers are noticing a difference at all might, paradoxically, be evidence that the work is more specific than a generic approximation would have produced.

How The Peaky Blinders Accent Has Evolved On Screen

The original series was itself criticised in certain quarters for accent inconsistency, particularly in its early seasons. Over time, the show developed a version of the Birmingham accent that became part of its identity, even if purists pointed out it was a theatrical interpretation rather than a documentary reproduction. New cast members joining an established production inherit that stylised version as the benchmark, creating a complex set of expectations for performers and coaches navigating historical accuracy and audience familiarity.

Fans call Barry Keoghan's accent "atrocious" in Peaky Blinders: The Immortal Man, and an acting coach explains why https://t.co/VFFNuixp5G

Moving Forward

— ScreenTime (@screentime) March 12, 2026

The Fan Response Online

Once the expert explanation began circulating, the tone of the online discussion shifted noticeably. Many of the people who had initially been critical acknowledged they had not been aware of the regional variation within Birmingham speech, and that understanding the deliberate specificity of what Keoghan was doing changed how they listened. A number of commentators pointed out that this kind of attention to detail is precisely what separates a well-produced period drama from a generic one.

Does It Actually Matter?

Dialect experts make a consistent point: accent accuracy in drama matters because it is part of character. An incorrect or inconsistent accent pulls a viewer’s attention away from the story and toward the surface of the performance. When it works well, it disappears entirely, and the viewer is simply watching a person rather than an actor approximating one. The fact that Keoghan’s accent has drawn attention is partly a sign of how high the bar has been set by the rest of the production.

Whether viewers ultimately decide they like the accent or not, the broader conversation has been a genuinely interesting one. It has reminded a large audience that the Birmingham accent is not the flat, uniform sound that decades of cultural dismissal have implied, and that the actors and coaches who spend weeks working to inhabit it are engaged in something considerably more demanding than most people give them credit for.