When X-Files returns to the big screen we can expect a Mulder and Scully storyline but we'll also be introduced to a new pair of agents played by Amanda Peet (The Whole Nine Yards) and rapper Xzibit (host of Pimp My Ride).
Comedian Billy Connolly is also onboard, although there has been no mention of his role. Aside from comedy, you've heard him in Open Season (2006) and he's recently appeard in Lemony Snicket's A Series of Unfortunate Events (2004) and The Last Samurai (2003).
Source: Hollywood Reporter