The Twilight Saga refers to the series of books and movies beginning with the one entitled Twilight. The movie saga includes Twilight, New Moon, and Eclipse, and once the two-part Breaking Dawn is made, that will also be part of the saga.
Twilight and mew moon are the only twilight saga movies out for now.
John Williams' first official movie he scored the music for was Daddy-O (1959).
new moon: November 20th 2009 Eclipse: June 20th 2010 Breaking dawn: unknown
Jack Black's first movie was "Our shining moment." It was a made for tv movie.
The first movie made and directed by Todd Phillips was a documentary of feature length, called "Hatred". His first movie with actors is called "Frat House".