1951: Born in Ruitu, the eldest daughter of the late King Bhumibol of Thailand, Bhumibol was studying at a university in Switzerland.
1952: His brother, the current King of Thailand, Vajiralongkorn, is born.
1960s: As a teenager, he shared his father's hobbies, including tennis, badminton and sailing.
1967: Gold medal in sailing sharing with his father at the Southeast Asian Games.
1969: Studied nuclear physics at the Massachusetts Institute of Technology.
(▲Princess Ubon Ratchathani and Jensen)
1972: Married to fellow American classmate Jensen, he was forced to renounce his royal status because he married a foreigner.
1973: Graduated from the Provincial Institute of Technology, moved to California, USA, and has two daughters and one male.
1975: Master of Public Health from UCLA.
1990s: Returned to Thailand frequently to assist her mother in hosting charity projects and founded the Ubon Ratchathani Fund to assist AIDS orphans.
1991: Frequently featured on the cover of magazines and active in social circles.
1998: Divorced Jansen and returned to Thailand with three children, regaining the royal title. The three children were granted Thai citizenship and royal status.
2002: Creation of the Anti-Drug Fund, an initiative to keep young people away from drugs.
2003: Participated in a TELEVISION series, playing the role of an ancient princess.
2004: The second son dies in the Indian Ocean tsunami.
2008: Debuted on the big screen as a film adaptation of a novel she wrote; two years later, she appeared in the film.
2016: Bhumibol dies and Vajiralongkorn takes the throne. During the mourning, Thaksin's daughters encouraged each other on social media.
2018: Watching the Fifa World Cup in Russia with former Prime Minister Thaksin Shinawatra and Yingle siblings, photos spread widely on social media.
8 February 2019: PhEUP nomination by Thaksin as prime minister candidate.