The Duke of Cambridge has proven Indian ancestry, according to new DNA analysis.
Scientists testing saliva samples from Prince William's relatives discovered a direct link between the future king and a woman who was part-Indian.
The connection traces back just eight generations, with the woman, Eliza Kewark, being the Duke's great, great, great, great, great grandmother.
She was housekeeper to his fifth great-grandfather Theodore Forbes, born in 1788, a Scottish merchant who worked for the East India Company in Surat, a port north of Bombay.
The research was carried out by BritainsDNA, a genetic ancestry testing company, which found that the Duke's genetic connection to the populous Commonwealth nation runs through the maternal line.
They used a mixture of traditional genealogy and cutting-edge science to come up with the findings.
The research shows that the second in line to the throne carries Eliza's mitochondrial DNA (mtDNA). Mitochondrial DNA is a small piece of DNA inherited mostly unchanged from a mother to her children.
Scientists said it is "very likely" that Prince William's heirs will also carry a small proportion of Indian DNA from Eliza, whose father may have been of Armenian descent.
Dr Jim Wilson, a genetics expert at the University of Edinburgh and chief scientist at BritainsDNA, who carried out the scientific research, said: "This is a great example of how genetics can be used to answer specific historical questions and uncover fascinating facts about our ancestry."