kingpins in the world. >> her connection to el chapo started in 2012 with a tweet she posted, saying she trustedhe drug lord more than the mexican government. the tweet generated a lot of controversy, but apparently, it also opened some secret doors to the underworld of mexican drug cartels. >> reporter: this is the woman sean penn says served as link between him and joaquin el chapo guzman. kate del castillo has been famous in mexico for a long time, but americans have only been introduced to the actress in recent years. she has appeared in films like last year's "no good deed," a thriller about a man who escapes from prison. >> i tried to wait. >> reporter: the 43-year-old also played mexican crime bust on season five of the series "weeds" in 2009. after a successful career as a soap opera actress in mexico, castillo rose to fame thanks to