Ken Rosenberg is a character in the Grand Theft Auto series who appears as the deuteragonist in Grand Theft Auto: Vice City (set in 1986) and a main character in Grand Theft Auto: San Andreas (set in 1992). He is also mentioned in Grand Theft Auto: Vice City Stories (set in 1984). In 1986 he has an appearance resembling David Klenfield from the 1993 flim Carlito's Way with a haircut resembling that of Sonny Corleone from the classic gangster film The Godfather and a purple soiree suit. In 1992 his hair is shorter with a small ponytail on the back. His outfit consists of a black t-shirt and three-button suit coat, beige pants and shoes.
Ken is voiced in both of his appearances by William Fichtner (also credited as Bill Fitchner), who has starred in, amongst other things, the film Empire Falls.