Jamie Kennedy Patrick Dempsey for Transformers 3 May 5, 2010 Jamie Kennedy and Patrick Dempsey to join third Transformers picture Jamie Kennedy and Patrick Dempsey have joined the cast of Transformers 3. Dempsey told reporters that he will be playing a dark character in the third film in the franchise. Kennedy revealed to an Arizona radio station that he “may have a role in the movie”. Details on the actors’ possible roles in the Michael Bay directed film have not been announced. The film is expected to arrive in cinemas in 2011.