Sujarinee Vivacharawongse (Thai: สุจาริณี วิวัชรวงศ์; RTGS: Sucharini Wiwatcharawong; 26 May 1962), born Yuvadhida Polpraserth (Thai: ยุวธิดา ผลประเสริฐ; RTGS: Yuwathida Phonprasoet), stage-named Yuvadhida Suratsawadee (Thai: ยุวธิดา สุรัสวดี; RTGS: Yuwathida Suratsawadi) or nicknamed Benz (Thai: เบ๊นซ์), is a Thai actress who was a consort and then the second wife of Vajiralongkorn, then the Crown Prince of Thailand, from 1994 to 1996. She now lives in the United States.^[2]

Sujarinee was born on 26 May 1962, the daughter of Thanit Polpraserth and Yaovalak Komarakul na Nagara. Her father was a musician and composer in the Sunthraphon band.^[3] Her mother is a direct descendant of King Taksin the Great of the Thonburi Kingdom through the Komarakul na Nagara family whose ancestor was Chaophraya Nakhon (Noi), an acknowledged, natural son of the king.^{[4][5][6][7][8][9]}

At fifteen, she was introduced to Thai filmography when actress Sarinthip Siriwan helped her to find a job in the drama Kot haeng kam and Manut pralat. In 1977, she co-starred in the films Sip ha yok yok sip hok mai yon and Lueat nai din. In 1978 and 1979, she was a leading actress in the film Saen saep, Ai thuek and Hua chai thi chom din.^{[citation needed]}

In August 1979, she announced her retirement from the entertainment industry.^[10]

When Vajiralongkorn was introduced to Yuvadhida Polpraserth, she was an aspiring actress. She became his steady companion and gave birth to four sons and a daughter:^[11]

• Prince Juthavachara Mahidol (จุฑาวัชร มหิดล Chuthawat Mahidon, born 29 August 1979), married Riya Gough on 1 September 2013, has issue.
• Prince Vacharaesorn Mahidol (วัชรเรศร มหิดล Watchareson Mahidon, born 27 May 1981), married Elisa Garafano, has issue
• Prince Chakriwat Mahidol (จักรีวัชร มหิดล Chakkriwat Mahidon, born 26 February 1983)
• Prince Vatcharawee Mahidol (วัชรวีร์ มหิดล Watcharawi Mahidon, born 14 June 1985)
• Princess Busyanambejra Mahidol (บุษย์น้ำเพชร มหิดล Butnamphet Mahidon, born 8 January 1987)^[12]

They were married at a palace ceremony in February 1994, where they were blessed by the King and the Princess Mother, but not by the Queen. After the marriage, she was allowed to change her name to Mom Sujarinee Mahidol na Ayudhya (หม่อมสุจาริณี มหิดล ณ อยุธยา), signifying she was a commoner married to a royal. She was also commissioned as a major in the Royal Thai Army and took part in royal ceremonies with Vajiralongkorn. When she fled to Britain in 1996 with their children, Vajiralongkorn had posters placed around his palace accusing her of committing adultery with Anand Rotsamkhan (อนันต์ รอดสำคัญ), a 60-year-old air marshal.^[13]

Sujarinee, together with her children, moved to England in 1996. While she and her sons are reportedly banished from Thailand, her only daughter, Princess Busyanambejra (later changed to HRH Princess Sirivannavari) returned to Thailand to live with Vajiralongkorn.^[14] Sujarinee and her sons have since moved to the United States.^[15]

• 1995 – Commander (Third Class) of the Most Exalted Order of the White Elephant^{[citation needed]}
• 1993 – Commander (Third Class) of the Most Noble Order of the Crown of Thailand^[17]