He was the only surviving son of Henry VII, so he became king in 1509
[DOC] [TLE] Frequently Asked Questions And Facts About Henry VIII's Reign ... [PAR] Find out why the Tudors are so famous; why Henry VIII married six times, ... Henry 
Tudor became Henry VII when he won the throne from King Richard III at ... Henry 
VII was 28 when he became king and ruled for 24 years until his death on 21 
April 1509, ... Henry VIII and Katherine of Aragon had only one surviving 
daughter,... [DOC] [TLE] Life and Times of King Henry VII and VIII [PAR] The future King Henry VIII just turned 18 on June 28, 1509.