Simon Pegg
Simon Pegg (born 14th February 1970) voiced Don Chaney in Invaders from Mars and played the Editor in The Long Game. He also narrated the first series of Doctor Who Confidential.
Pegg was originally going to play Pete Tyler, but he wasn't free when Father's Day was being filmed, so played The Editor instead. (Doctor Who DVD Files Issue 4)
Pegg wrote and starred in Spaced (alongside Jessica Stevenson), which referenced and parodied many science fiction series, including Doctor Who, when the shop in which Pegg's character works has a door that is decorated to resemble the TARDIS. In a DVD commentary, it is also noted that this has extra significance, in that the stockroom on the other side of the door is noticeably larger than the shop floor from which it is seen.
Pegg later achieved international attention for his films Shaun of the Dead, in which he starred with Penelope Wilton and Bill Nighy, and Hot Fuzz. In 2009, Pegg appeared in J.J. Abrams' reinvention of the television franchise Star Trek, carrying on from the late James Doohan in the role of Chief Engineer Montgomery Scott. In doing so he becomes possibly the most famous of only a small number of actors who have appeared in incarnations of both Doctor Who and Star Trek. (Coincidentally, Pegg shares several scenes with another Doctor Who alumnus, Deep Roy, who appears as Scotty's alien assistant.)