Zhuge Jun and his brothers hailed from Langya. Zhuge Jun, due to the early death of his fatherZhuge Gui, was raised alongside his brother Zhuge Liang under the care of their uncleZhuge Xuan. When Zhuge Xuan was appointed as the Administrator of Yuzhang by Yuan Shu, he took Zhuge Jun and his brothers with him to Yuzhang. However, later, when the Han court appointed Zhu Hao to replace Zhuge Xuan, the latter left for Jingzhou to join his old friend Liu Biao. Zhuge Jun and Zhuge Liang followed him to Jingzhou. Eventually, while Zhuge Liang served in Shu Han, Zhuge Jun also attained the rank of colonel.