On his 18th birthday on 30 January 1986, Felipe swore allegiance to the Constitution and to the King in the Spanish Parliament as required by the constitution, fully accepting his role as successor to the Crown.
在1986年1月30日他的18岁生日之际，应宪法要求，费利佩在西班牙议会宣誓效忠西班牙宪法和国王，完全接受他作为王冠继承者的角色。