She became heir apparent to the Swedish throne on January 1, 1980, after the Swedish Parliament passed an amendment to the Act of Succession that established absolute primogeniture. Prior to that, succession was limited to males. The process to change the succession began shortly after Victoria's birth, and during the two years it took to pass the amendment, her brother Carl Philip was born, who was briefly heir apparent but was displaced when the change went into effect. Victoria is set to become the modern world's first ruling queen to inherit a throne despite having a living legitimate and eligible brother.