Jane Seymour Fonda (born December 21, 1937) is an American actress and activist. Recognized as a film icon, Fonda's work spans several genres and over six decades of film and television. She is the recipient of numerous accolades, including two Academy Awards, two British Academy Film Awards, seven Golden Globe Awards, and a Primetime Emmy Award as well as nominations for a Grammy Award and two Tony Awards. Fonda also received the Honorary Palme d'Or in 2007, the AFI Life Achievement Award in 2014, the Golden Lion for Lifetime Achievement in 2017, the Cecil B. DeMille Award in 2021, and the Screen Actors Guild Life Achievement Award in 2025.

Born to socialite Frances Ford Seymour and actor Henry Fonda, she made her screen debut in the romantic comedy Tall Story (1960). She rose to prominence acting in the comedies Cat Ballou (1965), Barefoot in the Park (1967), and Barbarella (1968). Fonda established herself as a dramatic actress, winning two Academy Awards for Best Actress for her roles as a prostitute in the thriller Klute (1971) and the woman in love with a Vietnam War veteran in the drama Coming Home (1978). She was Oscar-nominated for They Shoot Horses, Don't They? (1969), Julia (1977), The China Syndrome (1979), On Golden Pond (1981), and The Morning After (1986). After a 15 year hiatus, she returned to acting in Monster-in-Law (2005), Youth (2015), and Our Souls at Night (2017).

On stage, Fonda made her Broadway debut in the play There Was a Little Girl (1960), for which she was nominated for the Tony Award for Best Featured Actress in a Play. In 2009, she returned to Broadway for the play 33 Variations (2009), earning a Tony Award for Best Actress in a Play nomination. For her work on television, she won the Primetime Emmy Award for Outstanding Actress in a Limited Series or Movie for the television film The Dollmaker (1984). She also was Emmy-nominated for her roles in The Newsroom (2012–2014) and Grace and Frankie (2015–2022).

Fonda was a political activist in the counterculture era during the Vietnam War. She was photographed sitting on a North Vietnamese anti-aircraft gun on a 1972 visit to Hanoi, during which she gained the nickname "Hanoi Jane". Fonda protested the Iraq War along with violence against women, and she describes herself as a feminist and environmental activist. Fonda has co-founded the Hollywood Women's Political Committee in 1984 and the Women's Media Center in 2005. Fonda is also known for her exercise videos, starting with Jane Fonda's Workout (1982), which became the highest-selling pre-recorded video cassette of its time.

Jane Seymour Fonda was born via caesarean section on December 21, 1937, at Doctors Hospital in Yorkville, Manhattan in New York City. Her parents were Canadian-born socialite Frances Ford Seymour and American actor Henry Fonda. According to her father, the surname Fonda came from an Italian ancestor who immigrated to the Netherlands in the 1500s. There, he intermarried; the resultant family began to use Dutch given names, with Jane's first Fonda ancestor reaching New York in 1650. Fonda also has English, French, and Scottish ancestry. She was named for the third wife of Henry VIII, Jane Seymour, to whom she is distantly related on her mother's side, and because of whom, until she was in fourth grade, Fonda said she was called "Lady" (as in Lady Jane). Her brother, Peter Fonda, was also an actor, and her maternal half-sister is Frances de Villers Brokaw (also known as "Pan"), whose daughter is Pilar Corrias, the owner of the Pilar Corrias Gallery in London.

In 1950, when Fonda was 12, her mother died by suicide while undergoing treatment at Craig House psychiatric hospital in Beacon, New York. Later that year, Henry Fonda married socialite Susan Blanchard, 23 years his junior; this marriage ended in divorce. Aged 15, Jane taught dance at Fire Island Pines, New York. Fonda attended Greenwich Academy in Greenwich, Connecticut; the Emma Willard School in Troy, New York; and Vassar College in Poughkeepsie, New York. Before her acting career, she was a model and appeared twice on the cover of Vogue.

Fonda became interested in the arts in 1954, while appearing with her father in a charity performance of The Country Girl at the Omaha Community Playhouse. After dropping out of Vassar, she went to Paris for six months to study art. Upon returning to the US, in 1958, she met Lee Strasberg; the meeting changed the course of her life. Fonda said, "I went to the Actors Studio and Lee Strasberg told me I had talent. Real talent. It was the first time that anyone, except my father – who had to say so – told me I was good. At anything. It was a turning point in my life. I went to bed thinking about acting. I woke up thinking about acting. It was like the roof had come off my life!"

Fonda's stage work in the late 1950s laid the foundation for her film career in the 1960s. She averaged almost two movies a year throughout the decade, starting in 1960 with Tall Story, in which she recreated one of her Broadway roles as a college cheerleader pursuing a basketball star, played by Anthony Perkins. Period of Adjustment and Walk on the Wild Side followed in 1962. In Walk on the Wild Side, Fonda played a prostitute and earned a Golden Globe for Most Promising Newcomer. In 1963, she starred in Sunday in New York. Newsday called her "the loveliest and most gifted of all our new young actresses". However, she also had detractors – in the same year, the Harvard Lampoon named her the "Year's Worst Actress" for The Chapman Report. Her next two pictures, Joy House and Circle of Love (both 1964), were made in France; with the latter, Fonda became one of the first American film stars to appear nude in a foreign movie. She was offered the coveted role of Lara in Doctor Zhivago, but turned it down because she didn't want to go on location for nine months.