Rapper Ludacris has joined Vince Vaughn, DAME Judi Dench, Paul Giamatti and Kevin Spacey for the Christmas comedy Fred Claus. Vaughn stars as Santa's loser brother living in New York City who returns home to the North Pole and almost ruins Christmas. Ludacris, real name Chris Bridges, will play an angry elf who works for Santa, played by SIDEWAYS star Paul Giamatti.