King Tut was nine years old when he became the ruler of Egypt.
King Tutankhamun, also known as King Tut, was an ancient Egyptian pharaoh who became the ruler of Egypt at the age of nine. He is best known for his intact tomb, which was discovered in 1922 by British archaeologist Howard Carter. King Tut's tomb contained a wealth of artifacts, including a solid gold mask, and provided valuable insight into the life and times of the ancient Egyptians. King Tut's reign lasted for only nine years, before he died at the age of 18.