Prince Souphanouvong, nicknamed the Red Prince, was along with his half-brother Prince Souvanna Phouma and Prince Boun Oum of Champasak, one of the "Three Princes" who represented respectively the communist (pro-Vietnam), neutralist and royalist political factions in Laos. He was the President of Laos from December 1975 to October 1986.

Prince Souvanna Phouma was the leader of the neutralist faction and Prime Minister of the Kingdom of Laos several times.