Macedonian king of Egypt from 47 to 44 BC, coruler with his elder sister, the famous Cleopatra VII (Cleopatra), by whom he was reportedly killed in 44 to make way for Ptolemy XV Caesar (Caesarion), her son by Julius Caesar (Caesar, Julius).

Following the death of his brother Ptolemy XIII Theos Philopator at the end of the Alexandrian War between Caesar and the Ptolemaic forces, Ptolemy XIV was elevated by Caesar to corulership with Cleopatra. When his sister followed Caesar to Rome in 46, Ptolemy accompanied her. Little is recorded about his stay there; but after Caesar's death, when his sister returned to Egypt, the young king died—probably at Cleopatra's command—and her son, Ptolemy Caesar, became joint ruler with the queen.