Princess Maha Chakri Sirindhorn

Sirindhorn
Princess Royal of Thailand
Princess Maha Chakri Sirindhorn
Born	(1955-04-02) 2 April 1955 (age 61) Bangkok, Thailand
House	Mahidol (Chakri Dynasty)
Father	King Bhumibol Adulyadej (Rama IX)
Mother	Queen Sirikit
Religion	Buddhism
Signature

Thai Royal Family
HM The King HRH Princess Bajrakitiyabha HRH Princess Sirivannavari Nariratana HRH Prince Dipangkorn Rasmijoti HM The Queen Dowager HRH Princess Maha Chakri Sirindhorn HRH Princess Chulabhorn Walailak HRH Princess Siribhachudabhorn HRH Princess Aditayadornkitikhun Princess Ubolratana Rajakanya Khun Ploypailin Jensen Khun Sirikitiya Jensen HRH Princess Soamsawali

Styles of Princess Maha Chakri Sirindhorn of Thailand
Reference style	Her Royal Highness
Spoken style	Your Royal Highness
Alternative style	Ma'am

HM The Queen Dowager

Princess Maha Chakri Sirindhorn (Thai: มหาจักรีสิรินธร, Thai pronunciation: [mā.hǎː t͡ɕàk.krīː sì.rīn.tʰɔ̄ːn]; rtgs: Maha Chakkri Sirinthon), born Princess Sirindhorn Debaratanasuda Kitivadhanadulsobhak (Thai: สิรินธรเทพรัตนสุดา กิติวัฒนาดุลโสภาคย์; rtgs: Sirinthontheppharattanasuda Kitiwatthanadunlasophak) on 2 April 1955 is the second daughter of King Bhumibol Adulyadej.

Her full ceremonial title is Somdech Phra Debaratanarajasuda Chao Fa Maha Chakri Sirindhorn Rathasimagunakornpiyajat Sayamboromrajakumari (สมเด็จพระเทพรัตนราชสุดา เจ้าฟ้ามหาจักรีสิรินธร รัฐสีมาคุณากรปิยชาติ สยามบรมราชกุมารี; rtgs: Somdet Phra Theppharat Rat Suda Chao Fa Maha Chakkri Sirinthon Ratthasima Khunakon Piyachat Sayam Borommaratchakumari), which was bestowed upon her on 5 December 1977. Thais commonly refer to her by reducing such title to "Phra Thep", meaning "princess angel". Her title in Thai is the female equivalent of the title once held by her brother, King Maha Vajiralongkorn. The Thai constitution was altered in 1974 to allow for female succession, thus making her eligible for the throne.