Upon completion of Shaun of the Dead, Pegg was questioned on whether he would be abandoning the British film industry for bigger and better things, to which he replied "It's not like I'm going to run off and do Mission: Impossible III!" He then went on to play Benji Dunn, an I.M.F. technician who assists Tom Cruise's character, Ethan Hunt. in Mission: Impossible III.
Gotta love Simon Pegg.