He takes over for Lisa MacDonald.
Rexworthy will now oversee all of Sky's film acquisition and rights negotiations, including overseeing the development of VOD and PPV movie services.
He continues as Financial Controller for Movies until a replacement in that post is appointed. Rexworthy has been at Sky since May 2002 and at Sky Movies since September 2006.
Ian Lewis, Director of Sky Movies and SBO said: 'Simon's already excellent credentials, his knowledge and understanding of Sky, coupled with his enthusiasm, commitment, tenacity and vision for the movies service made him the obvious person for this well-earned role.'