Saudi King Salman ousted his nephew as crown prince on Wednesday and installed his son Mohammed bin Salman. His appointment completes a gradual removal of powers from Mohammed bin Nayef, 57, who has been fired, with his rise symbolising the hopes of Saudi's youthful population, more than half of which is under 25.
According to a royal decree issued by the official Saudi Press Agency, Mohammed bin Salman, 31, was also named deputy prime minister, and also continues to be minister of defence.
His appointment caps a tumultuous two years since Salman, 81, ascended the throne and named the thick-bearded Mohammed bin Salman deputy crown prince, or second in line to the throne.
Mohammed bin Nayef, a veteran law enforcer well-regarded in the West for his efforts to combat Al-Qaeda, was also fired from his post as interior minister, the decree said.
The hard-charging Mohammed bin Salman's public profile rapidly eclipsed that of the crown prince.
Salman had already set a precedent for removal of a crown prince when, in April 2015, he appointed Mohammed bin Nayef and fired Prince Moqren bin Abdul Aziz bin Saud, who had assumed the post under the late King Abdullah.
The move left Mohammed bin Nayef as the first of the second generation, or grandsons of the kingdom's founder, Abdul Aziz bin Saud, in line to lead the Islamic kingdom.