Trump, 71, and Mohammed, 31, have met twice - once in Riyadh during the United States leader's recent trip to Saudi Arabia and once in mid-March at the White House.
Prime Minister Muhammad Nawaz Sharif on Thursday felicitated Mohammad Bin Salman Bin Abdulaziz Al-Saud on his appointment as the Crown Prince of Kingdom of Saudi Arabia.
After the decrees were announced, Saudi TV aired footage of the new crown prince warmly greeting the man he is replacing, Mohammed bin Nayef.
This puts Mohammed bin Salman bin Abdulaziz in direct line to succeed his father as Saudi Arabia's ruler.
The Israeli regime also signaled that it welcomes the move with Communications Minister Ayoub Kara, asserting that it "means more economic cooperation in the Middle East, and not just regarding oil".
Advertisements and proclamations have been churned out by public figures such as clerics and royals and businessmen in their thousands in a country where dissent against the absolute monarchy is nearly non-existent - but a full page advertisement taken out in a Saudi newspaper by McDonald's, wishing the promoted prince "peace and prosperity", has perplexed many people both inside the kingdom and internationally. He became the special advisor to his father, when the later was still a governor. Also, they say that Qatar is siding Iran.
The King Salman, 81, is reportedly not in the best of health.
Staunchly opposed to the Israeli influence in the region, Iran seems opposed to the new appointment.
A senior advisor to Iran's foreign minister, Hossein Sheikholeslam, was quoted by the semi-official Fars news agency as linking bin Salman's elevation to a "deal" made with President Trump.
"We won't wait for the battle to be in Saudi Arabia".
On June 5, the Saudis and their allies severed diplomatic ties with Qatar in protest at the Gulf state's alleged support for terrorist groups. MbN, stripped both of his rank as heir and his position as the veteran head of Saudi Arabia's internal security forces, was among the first to pledge allegiance to his newly elevated younger cousin. He was the prime mover behind the decision to escalate Saudi Arabia's role in the Yemen civil war, where Saudi airplanes have bombed Houthi rebels backed by Iran.