You can be an actor in twilight by contacting and getting listed with an agent and discussing further options from there. Though I assume it might be too late for that, since the filming for the 4 movie (part 1) has already began. There are also casting calls for extras on various movies and tv shows, twilight included, you might want to do some research on casting calls or agents and see where that brings you. :)
Yes, the character of Mike Newton in Twilight and New Moon by the actor Mike Welch.
The actor who plays Tyler Crowley in the movie Twilight is Gregory Tyree Boyce.
No. Tom Felton was not an actor in any of the Twilight Saga movies, including Twilight's Eclipse (Twilight 3). The character of Riley Biers was played by the actor Xavier Samuel.
None.
The actor that portrays "James" in the movie, Twilight is Cam Gigandet.
The actor who portrays 'Alec' in the Twilight Saga is Cameron Bright.
Cam Gigandet
The actor who plays Emmett Cullen is Kellan Lutz!
i don't think there was a twilight actor in push but there was an actor that is playing in new moon. i believe it was Dakota fanning. she is playing Jane in new moon.
The actor is Robert Pattinson, who played Edward Cullen in the "Twilight" saga and also appeared in the TV show "Melrose Place".
Jackson Rathbone.
Sarah Clark.