Keith Thibodeaux – 70

Not only is Keith Thibodeaux the adorable little boy known as Little Ricky from ‘I Love Lucy’, he also holds the pedigree of being the only living member of the cast today. After the conclusion of the sitcom, Keith went on to play in a rock band, David and the Giants. In 1976, he married a former ballerina and together they have a daughter who has now followed in her mother’s footsteps. Producer Desi Arnaz changed Keith’s name to simply ‘Keith’ because his Cajun French surname was plainly too difficult to pronounce.