Sienna Miller was born on December 28, 1981 in New York, New York.

Sienna spent most of her youth attending school in England, including Heathfield in Ascot, Surrey, one of the few remaining all-girl boarding schools. As a student, Sienna was known for her wild side: she had a penchant for streaking the lacrosse field and snogging the gardener. All in all, Sienna balanced having a good time with excelling in her studies, which included dance, music, sports and acting.

Sienna returned to New York after graduating from Heathfield to study acting full time at the Lee Strasberg Institute. She performed in numerous NYC productions, including "A School for Scandal" by British playwright Richard Brinsely Sheridan and "Cigarettes and Chocolate" by writer/director Anthony Minghella. Sienna made the jump to television with her role as Fiona Bickerton on "Keen Eddie". She was also cast in a remake of the 1966 comedy classic, "Alfie" (2004).

Sienna's skills as an actress attracted the attention of British producer Matthew Vaughn. Vaughn cast Sienna in his first feature as director, "Layer Cake" (2004).

In 2005 while Sienna was appearing in London's West End production of "As You Like It" her fianc� Jude Law made a public admission of infidelity, apologizing for an affair with his children's nanny. The couple's seemingly on-again, off-again relationship captivated the press for several months in 2005. At the same time, Sienna Miller demonstrated her continuing growth as an actress in "Casanova" (2005).

Misspellings & aliases:
Senna, Sinna, Siena, Seena, Sianna, Siehna, Siehnna, Siana, Siennah, Sienah, Miler, Mihler, Myller, Mihller, Milerr.