Is King Tut and Tutankhamen the same person?

Yes.

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Yes, King Tut and Tutankhamun are the same person. Tutankhamun, often referred to as King Tut, was an ancient Egyptian pharaoh who ruled during the 18th dynasty of the New Kingdom period. He is well-known for his intact burial tomb that was discovered in 1922 by archaeologist Howard Carter in the Valley of the Kings in Egypt. Through examining historical records and artifacts, it was determined that the mummy found in the tomb belonged to Tutankhamun, thus confirming his identity as King Tut.