Hello how may I help you? Hi, I have a question about a world record. Sure, I'd be happy to help with that! OK, who is the tallest person in the world? Do you mean the tallest living person or the tallest person to have ever lived? How about both? The tallest living person is Sultan Kosen. The tallest person to have ever lived was Robert Wadlow. Is Sultan Kosen mean or nice? He is probably a very nice gentleman. I guess I'll take your word for it. Thanks! No problem!