Hello how may I help you? Hi, can you help with world records? Yes, do you have a specific question in mind? Can you tell me who is the world's tallest person? Do you mean living or all time/ All time, please. Robert Wadlow is the tallest person that ever lived. How tall was Mr Wadlow? He was 8 feet and 11 inches tall. Wow that is incredible! Well, thanks for your help! Have a nice day