 Roberto Rodriguez (the main character) is named after  Nicolás López (III) (qv)s idol, Robert Rodriguez (I) (qv).  Lopez finally met him during the press junket of  _Sin City (2005)_ (qv), because Rodriguezs wife and producer  Elizabeth Avellan (qv) loved the movie (she watched it in the SXSW  Film Festival after reading a letter that Lopez sent to Rodriguez  begging him to watch the movie).