Script
To prompt an actor is to give him his next line when he has forgotten it.
It is called a 'cue'. It is the last line of the preceding actor.
Tobey Maguire played him in the first movies. Andrew Garfield is the next actor in line
Giving a line to an actor is prompting.
Yes. The actor Will Ferrell does appear in the film called The Thin Pink Line.He plays the role of Darren Clark in the film.The Thin Pink Line was released in the year 1998. It was directed by Joe Dietl and Michael Irpino.
Actor from Dallas
It's called an "aside". It is a line that the playwright directs the actor to deliver to the audience, which is called "breaking the fourth wall". Neil Simon's comedy "Fools" is full of asides to the audience.
Yes, Danny Glover did appear in Second Line, a short film. The film was released in 2010.He played the role of "Businessman".
Generally an actor with no dialogue is called an extra.
The character is called 'Brick top' played by Actor Alan Ford. It's a line from the 2000 film 'Snatch'
action
An "exit line" is the last line before an actor departs the stage, and the entries are when the first line is spoken.