Strange things were afoot on Twitter and Tumblr on Thursday night when Matt Smith's sister sent a tweet  implying the former Doctor Who star had some big news to come. The fandom got a little excited speculating what the Doctor was up to (a late addition to the Star Wars cast ?), and today we learned he's signed on to the new Terminator film  in a "major" role.
The details of Matt's role are still a mystery, but fans are pretty thrilled to hear he'll be an addition to this huge sci-fi franchise. Naturally, fez, bow tie, and hyperventilating status updates were next . . .
We don't have a TARDIS, but we do have a Time Lord: we're pleased to welcome Matt Smith to the cast of #Terminator .
— Skydance Productions (@Skydance) May 2, 2014 
Source: Twitter user ollyog 
Source: Twitter user joshadams