Julia O'Hara Stiles (born March 28, 1981) is an American actress. She first gained prominence for her lead roles in teen films such as 10 Things I Hate About You (1999), Down to You (2000) and Save the Last Dance (2001). Her career progressed to starring in films such as The Business of Strangers (2001), Mona Lisa Smile (2003) and The Omen (2006). She also played the supporting character Nicky Parsons in the Bourne film series (2002-2007).
She guest starred as Lumen Pierce in the fifth season of the Showtime series Dexter, a role that earned her Emmy Award nomination and Golden Globe Awardnomination. Most recently, Stiles had a supporting role in Silver Linings Playbook (2012), and also appears in Blue, a YouTube series from WIGS.
Stiles was born in New York City, the eldest of three children. Her mother, Judith Newcomb Stiles, is a potter, and her father, John O'Hara, is a businessman.Stiles is of English, Irish, and German descent. She started acting at the age of eleven, performing with New York's La MaMa Theatre Company.