With production already under way on Mission: Impossible 5, the action sequel is closing in on casting the main villain, with an offer out to Prometheus star Sean Harris.

Negotiations are currently under way, but nothing is set in stone at this time. No details were given about the villainous character, or the story line for this action-packed sequel.

Tom Cruise is returning as IMF agent Ethan Hunt, with Mission: Impossible Ghost Protocol stars Jeremy Renner, Ving Rhames and Simon Pegg returning as well. New cast members include Alec Baldwin as a high-ranking CIA officer who is in charge of the Impossible Mission Force unit lead by Ethan Hunt, and Rebecca Ferguson as the female lead.

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Christopher McQuarrie is directing from a script by Drew Pearce and Will Staples.

Aside from playing Fifield in Prometheus, Sean Harris most recently starred in Deliver Us from Evil, and he will next be seen in Serena.