King Salman ended the brother-to-brother succession and appointed his 56-year-old nephew Muhammad bin Nayef as Crown Prince in April 2015, thus making the next succession from uncle to nephew. At the same time, King Salman appointed his son, Mohammad bin Salman, as Deputy Crown Prince, thus making the following succession from cousin to cousin, as Mohammad bin Salman is the cousin of Crown Prince Muhammad bin Nayef. However, in June 2017, Salman elevated Mohammad bin Salman to Crown Prince, following his decision to depose Muhammad bin Nayef of all positions, making his son heir apparent to the throne, and making the next succession father to son, for the first time since 1953, when Saud bin Abdulaziz Al Saud succeeded his father, the founder of Saudi Arabia, Ibn Saud.