( CNN ) -- It 's an itch he just has n't been able to scratch . More than 54 years after he announced the success of Fidel Castro in the Cuban revolution , Larry King still has n't been able to interview him . `` The day Castro marched into Havana , I was on the air in Miami doing my morning show and I made the announcement , '' King told Ismael Cala in an interview for the `` Cala '' talk show on CNN en Español . Just two years ago , King was in Cuba to try to get that elusive Castro interview , but the Cuban leader remains the only major figure he has n't interviewed , he said . `` Forget politics , he has run a country for 50 years , he 's a successful revolutionary , an intriguing person , '' said King about why he remains fascinated . One top interview he did secure -- with the late Venezuelan President Hugo Chavez in 2009 -- came back into focus recently with Chavez 's death . `` What 's funny is that he spoke perfect English off air , but once the interview started , we had an interpreter , '' King said . `` He wanted to talk in his native language . '' King -- the last person to interview Chavez on CNN -- recalls Chavez being easy to be around and engaging , even remembering him as a hugger and singer . `` He was a conflicted person . An enigma . Yes , he was against capitalism , but he helped a lot of people , especially in the Northeast ( of the U.S. ) . When there was a shortage of oil , he gave a lot of free oil to that area . '' Cala and King also talked about King 's web-based show , `` Larry King Now , '' that 's been on Oratv.com and distributed by Hulu.com since July last year , and his backer -- Mexican billionaire Carlos Slim . `` Carlos Slim has become a good friend of mine , '' said King . `` He invited me to Mexico to speak at an event about three years ago , and it turns out he had been watching me for years . Now , we work together . '' `` It 's nice to have the richest man in the world be my partner , '' King added . `` He 's very good at standing aside and letting us do it . '' ( According to Forbes magazine , Slim is the world 's richest person with a net worth of $ 69 billion , having made his fortune in the telecommunications industry . ) Cala took the opportunity to tell King in person how much of an impression he 'd left on him when he was a young man in Cuba 15 years ago . `` When I first saw you , I was in Cuba and not knowing what my future would be , '' Cala said . `` And , now , I 'm sitting here and interviewing you . So , dreams come true . '' Cala even paid homage to his hero in his wardrobe choice for the interview , greeting King wearing a matching button-down shirt , tie and signature black suspenders . Since King lived in Miami for 20 years , some might find it odd that he never learned Spanish . `` I do n't have a linguistic ear . I never picked it up , '' King said . But he said he still loves the language and music . `` I 've always had Latin flavor . '' The interview was done in English and will be dubbed into Spanish for the CNN en Español show to air on Monday , March 25 , at 9 p.m . ET .
CNN en Español 's Ismael Cala interviews Larry King . King talks about still wanting to interview Fidel Castro . ` ` Forget politics , ... The US government has been accused of spying on the Brazilian president Dilma Rousseff and her top aides. King says . Cala pays homage to his hero by wearing matching signature black suspenders .