The truth is, Jesus became king when He ascended to heaven in AD 30 and established the church. Before that time, Jesus (along with others) promised that the kingdom was at hand (cf. Matt. 4:17).22 oct 2012
Why is Jesus called the King of Kings?
By position God was, is and will continue to be the ruler of all rulers, for he created everything and gave dominion to rulers he is King of Kings. Jesus as King of Kings is a title given to him after he completed his mission on earth. The one who sent him gave the honor of dominion over other dominion to Jesus.