Prince Turki bin Saud bin Turki bin Saud al-Kabeer was executed on Tuesday for shooting dead another young man during a brawl at a desert camp in 2012.
According to Interior Ministry, prince Turki bin Saud al-Kabir was put to death in the capital Riyadh for killing Adel al-Mahemid. After the investigations, they charged him by committing the crime and his indictment was sent to the court. A royal order was then issued to execute the courts' ruling, SPA said.
In 1977 Princess Mishael, a granddaughter of a brother of King Fahd of Saudi Arabia was executed after she married a man not selected by the family.
The ministry did not describe how the sentence was carried out, though the condemned are often beheaded with a sword, in public, in the Sunni-ruled kingdom.
While criminal acts committed by Saudi royals are sometimes censored, the execution of Prince Turki was widely reported through the state media.
The victim's family had also been offered blood money in exchange for dropping the charges against the prince, but they denied and demanded justice.
A report says the execution brings to 128 the number of persons put to death so far in the country this year.
Saudi Arabia, which applies a strict interpretation of Islamic law, is among the top executioners in the world, according to worldwide rights groups.
The House of Saud rarely sees executions of its own thousands of members.
Arab News quoted the victim's uncle Abdul Rahman al-Falaj, as saying that the sentence reflected the Kingdom's "fair justice system".
The country mostly delivers the death penalty to those convicted of murder and drug trafficking. Amnesty International said in a report that the kingdom carried out at least 158 death sentences in 2015.
One of those executed was prominent Shiite cleric Nimr al-Nimr, whose death in January sparked a diplomatic crisis between Saudi Arabia and Iran.