According to the Hollywood Reporter, former "General Hospital" star Marissa Ramirez (ex-Gia) has been upped to series regular on CBS' "Blue Bloods" beginning with the primetime shows fifth season. Ramirez, who joined the series as a recurring guest-star beginning with the Friday, March 8 episode entitled "Protest Too Much," portrays Detective Maria Baez, the former and now ful-time partner of Donnie Wahlberg's Detective Danny Raegan. The actress is replacing Jennifer Esposito, who portrayed Wahlberg's onscreen partner, Jackie Curatola, on the drama series until November of last year.