Agatha Christie’s Seven Dials (the 2026 TV adaptation) features a core ensemble led by Mia McKenna‑Bruce, Helena Bonham Carter, Martin Freeman, and more, with several sources confirming a very similar main cast list.

Main cast of Seven Dials

  • Mia McKenna‑Bruce as Bundle (Lady Eileen Brent), the bold young heroine who throws herself into the mystery.
  • Helena Bonham Carter as Lady Caterham, an eccentric and sharp‑tongued aristocrat tied to Bundle’s world.
  • Martin Freeman as Superintendent Battle, the quiet but relentless Scotland Yard detective.
  • Corey Mylchreest as Gerry Wade, whose suspicious death helps kick off the story’s central puzzle.
  • Edward Bluemel as Jimmy Thesiger, one of Bundle’s circle whose charm may or may not hide secrets.
  • Nabhaan Rizwan as Ronnie Devereux, a young man caught up in the conspiracy around the Seven Dials.
  • Alex Macqueen as George Lomax, a stiff, establishment politician with something to lose if scandal breaks.
  • Guy Siner as Tredwell, the unflappable butler who sees more than he says.

Quick context and trivia

  • The series is a new screen take on Agatha Christie’s 1929 novel The Seven Dials Mystery , updated with a modern prestige‑drama feel while keeping the country‑house‑mystery core.
  • Behind the camera, Chris Sweeney directs and Chris Chibnall is among the key creative figures, with several well‑known executive producers attached, signaling a high‑profile launch on streaming.

Simple HTML cast table

html

<table>
  <thead>
    <tr>
      <th>Actor</th>
      <th>Role</th>
    </tr>
  </thead>
  <tbody>
    <tr><td>Mia McKenna-Bruce</td><td>Lady Eileen "Bundle" Brent</td></tr>
    <tr><td>Helena Bonham Carter</td><td>Lady Caterham</td></tr>
    <tr><td>Martin Freeman</td><td>Superintendent Battle</td></tr>
    <tr><td>Corey Mylchreest</td><td>Gerry Wade</td></tr>
    <tr><td>Edward Bluemel</td><td>Jimmy Thesiger</td></tr>
    <tr><td>Nabhaan Rizwan</td><td>Ronnie Devereux</td></tr>
    <tr><td>Alex Macqueen</td><td>George Lomax</td></tr>
    <tr><td>Guy Siner</td><td>Tredwell</td></tr>
  </tbody>
</table>

Information gathered from public forums or data available on the internet and portrayed here.