Rachel Hannah Weisz (born March 7, 1970) is an English actress. She is the recipient of various accolades, including an Academy Award, a Golden Globe Award, a Screen Actors Guild Award, a Laurence Olivier Award, a Critics' Choice Award and a BAFTA Award.

Weisz began acting in British stage and television in the early 1990s, and made her film debut in Death Machine (1994). She won a Critics' Circle Theatre Award for her role in the 1994 revival of Noël Coward's play Design for Living and she went on to appear in the 1999 Donmar Warehouse production of Tennessee Williams' drama Suddenly, Last Summer. Her film breakthrough came with her starring role as Evelyn Carnahan in the Hollywood action films The Mummy (1999) and The Mummy Returns (2001). Weisz went on to star in several films of the 2000s, including Enemy at the Gates (2001), About a Boy (2002), Constantine (2005), The Fountain (2006) and The Lovely Bones (2009).

For her performance as an activist in the 2005 thriller The Constant Gardener, she won the Academy Award for Best Supporting Actress, and for playing Blanche DuBois in a 2009 revival of A Streetcar Named Desire, she won the Laurence Olivier Award for Best Actress. In the 2010s, Weisz continued to star in big-budget films such as the action film The Bourne Legacy (2012) and the fantasy film Oz the Great and Powerful (2013), and garnered critical acclaim for her performances in the independent films The Deep Blue Sea (2011), Denial (2016), and The Favourite (2018). For her portrayal of Sarah Churchill in the latter, she won the BAFTA Award for Best Actress in a Supporting Role and received a second Academy Award nomination. In 2021, Weisz starred as Melina Vostokoff in the Marvel Cinematic Universe film Black Widow.

Weisz was engaged to filmmaker Darren Aronofsky, with whom she has a son, from 2005 to 2010. She married actor Daniel Craig in 2011, with whom she has a daughter, and became a naturalised US citizen the same year.