Maria "Mia" de Lourdes Villiers-Farrow (born February 9, 1945) is an American actress. Farrow has appeared in more than forty films and won numerous awards, including a Golden Globe award (and seven additional Golden Globe nominations), three BAFTA Film Award nominations, and a win for best actress at the San Sebastian International Film Festival. Farrow is also notable for her extensive humanitarian work as a UNICEF Goodwill Ambassador. Her latest effort is www.miafarrow.org containing a guide on how to get involved with Darfur activism, along with her photos and blog entries from Darfur, Chad, and the Central African Republic.

Mia Farrow is the daughter of the director John Farrow (I) and the actress and Tarzan-girl 'Maureen OSullivan. She debuted at the movies in 1959 in very small roles. She was noticed for the first time in the film Rosemary's Baby (1968) by Roman Polanski. She showed her talent also on TV and at the theatre, but her final breakthrough was when she met Woody Allen and became his Muse after the film Midsummer Night's Sex Comedy, A (1982). After that, Woody Allen wrote many other roles for her.