Glenda Veronica Close (born March 19, 1947) is an American actress. In a career spanning over five decades on screen and stage, she has received numerous accolades, including three Primetime Emmy Awards, three Tony Awards and three Golden Globe Awards, in addition to nominations for eight Academy Awards, two BAFTA Awards, and three Grammy Awards. She was named by Time as one of the 100 most influential people in the world in 2019.

Close received eight Academy Award nominations for playing a feminist mother in The World According to Garp (1982), a baby boomer in The Big Chill (1983), a love interest in The Natural (1984), a psychotic ex-lover in Fatal Attraction (1987), a cunning aristocrat in Dangerous Liaisons (1988), an English butler in Albert Nobbs (2011), a troubled wife in The Wife (2017), and an eccentric grandmother in Hillbilly Elegy (2020). Her other films include Reversal of Fortune (1990), The Paper (1994), and Mars Attacks! (1996), Air Force One (1997), and Guardians of the Galaxy (2014). Close also portrayed Cruella de Vil in 101 Dalmatians (1996) and its 2000 sequel and voiced Kala in Tarzan (1999).

In television, Close received her first Primetime Emmy Award nomination for her role in the film Something About Amelia (1984) and later won three—Outstanding Lead Actress in a Limited Series or Movie for portraying Margarethe Cammermeyer in the NBC film Serving in Silence (1995) and Outstanding Lead Actress in a Drama Series twice consecutively for playing Patty Hewes in Damages (2007–2012).

On stage, Close made her Broadway debut in the play Love for Love (1974). She later won three Tony Awards, two for Best Actress in a Play for her roles in the plays The Real Thing (1983) and Death and the Maiden (1992), and one for Best Actress in a Musical for the musical Sunset Boulevard (1995). She was Tony-nominated for Barnum (1980). She returned to the Broadway stage in a 2014 revival of A Delicate Balance. In 2016, she returned to Sunset Boulevard on the West End stage, earning a Laurence Olivier Award for Best Actress in a Musical nomination.

Close is the president of Trillium Productions and co-founder of the website FetchDog. She has made political donations in support of Democratic politicians. She is vocal on issues such as women's rights, same-sex marriage, and mental health. Married three times, she has one daughter, Annie Starke, from her relationship with producer John Starke.