Ubol Ratana Rajakanya (Thai: อุบลรัตนราชกัญญา, RTGS: Ubonrat, pronounced [ʔùʔ.bōn.rát]; born 5 April 1951) [a] is a member of the Thai royal family. She is the eldest child of King Bhumibol Adulyadej and Queen Sirikit, and the elder sister of King Vajiralongkorn.

Her Royal Highness Ubolratana Rajakanya, more commonly referred to as Ubol Ratana, is a member of the Royal Thai family. Apart from being recognized as royalty, she is also an established actress, philanthropist, and screenwriter.

The Ubol Ratana Dam (pronounced: Ubon Rat), formerly known as the "Phong Neeb Dam", is a multi-purpose dam in tambon Khok Sung, Ubolratana district, approximately 50 km (31 mi) north of Khon Kaen, Khon Kaen province, Thailand.

Princess Ubol Ratana Rajakanya is the eldest child of King Bhumibol Adulyadej and Queen Sirikit. She was born on 5 April 1951, at Clinique de Montchoisi in Lausanne, Switzerland. She is the only child born outside of Thailand from the four children of former King Bhumibol and Queen Sirikit.

2019年2月8日 · Princess Ubolratana Rajakanya, the elder sister of Thailand’s King Maha Vajiralongkorn, has been nominated as the Thai Raksa Chart party’s candidate in the prime ministerial race, the party...

2019年2月8日 · SINGAPORE — Thai Princess Ubolratana Rajakanya Sirivadhana Barnavadi was on Friday (Feb 8) named as Thai Raksa Chart Party’s sole candidate for the upcoming prime ministerial election.

In 2019, it was announced Ubol Ratana would run as the prime ministerial candidate for the Thaksin-affiliated Thai Raksa Chart Party in the 2019 general election, called an "astonishing" move without precedent, as the royal family has never been directly involved in electoral politics.

Princess Ubol Ratana (Thai: อุบลรัตน, RTGS: Ubonrat, pronounced [ʔùʔ.bōn.rát]; born 5 April 1951) is a member of the Thai royal family. She is the eldest child of King Bhumibol Adulyadej and Queen Sirikit and elder sister of King Vajiralongkorn.