Professor Stephen Hawking, 74 has announced on his Facebook page that he plays the part of a villain in a new Jaguar ad. "You all know me as Professor Stephen Hawking, the physicist wrestling with the great concepts of time and space. But there is another side to me that you may not know: Stephen Hawking the actor," Hawking posted. "I have always wanted to be in a movie playing the part of a typical British villain. And now, thanks to Jaguar my wish has come true."