As you can see Simon Pegg's on set and plays Benji Dunn, as well as Paula Patton and of course Tom Cruise filming too. The fourth movie is directed by Brad Bird and the writers are J.J. Abrams (story), Josh Appelbaum (screenplay).
Stars: Tom Cruise (Ethan Hunt), Jeremy Renner (Brandt), Simon Pegg, Paula Patton, Josh Holloway, Michael Nyqvist, Léa Seydoux, Anil Kapoor and Vladimir Mashkov.
Mission: Impossible - Ghost Protocol (also known as Mission: Impossible IV) will be released next year on December 16th, 2011.
LEEE777 - I've really liked the film series and am looking forward to next years. Many thanks to the guys at Collider link below and comments, thoughts, let them out.