Naomi Ellen Watts (born September 28, 1968) is a British actress. She has been nominated for two Academy Awards for Best Actress for her performances as a grief-stricken mother in Alejandro González Iñárritu's film 21 Grams (2003), and as Maria Bennett in the disaster film The Impossible (2012).

After her family moved to Australia, she made her film debut there in the drama For Love Alone (1986) and then appeared in three television series, Hey Dad..! (1990), Brides of Christ (1991), and Home and Away (1991), and the film Flirting (1991). After moving to the United States, she initially struggled as an actress, taking roles in small-scale films until she starred in David Lynch's psychological thriller Mulholland Drive in 2001 as an aspiring actress. This role started her rise to international prominence.

She has served as an ambassador for the Joint United Nations Programme on HIV/AIDS and Pantene's Beautiful Lengths.

She had a relationship with Australian actor Heath Ledger from August 2002 to May 2004.

In 2005, she began a relationship with American actor Liev Schreiber. Their son Sasha was born in 2007, and their daughter Kai, who was assigned male at birth, was born in 2008. On 26 September 2016, Watts and Schreiber announced their split after 11 years together.

She began dating actor Billy Crudup in 2017, after they met on the set of the Netflix drama series Gypsy. The couple married on June 9, 2023..