Jennifer Anne Ehle (/ˈiːli/; born December 29, 1969) is an American and British actress. The daughter of writer John Ehle and English actress Rosemary Harris, Ehle started her career acting on stage in the United Kingdom, with the Edinburgh Festival, the Royal Shakespeare Company, and the National Theatre. She earned a Tony Award for Best Actress in a Play and a nomination for the Laurence Olivier Award for Best Actress in Tom Stoppard's The Real Thing. She reunited with Stoppard acting in his play The Coast of Utopia (2007), earning a Tony Award for Best Featured Actress in a Play. She appeared on Broadway in the J.T. Rogers play Oslo, earning a second Tony nomination for Best Actress.

Ehle is also known for her film performances, including The King's Speech (2010), Contagion (2011), Zero Dark Thirty (2012), A Little Chaos (2014), Fifty Shades of Grey (2015), Little Men (2016), Fifty Shades Darker (2017), Fifty Shades Freed (2018), Saint Maud (2019) and She Said (2022). She has also appeared in various television programs, including NBC's The Blacklist (2014–2015), the Hulu limited series The Looming Tower (2016), the Showtime miniseries The Comey Rule (2020), and the CBS legal drama The Good Fight (2022). She received the British Academy Television Award for Best Actress for her role as Elizabeth Bennet in the BBC miniseries Pride and Prejudice (1995). She starred in the 2023 Amazon Prime miniseries Dead Ringers.

Ehle was born in Winston-Salem, North Carolina, to English actress Rosemary Harris and American author John Ehle. Her ancestry includes Romanian (from a maternal great-grandmother) and, paternally, German and English.

Ehle appeared as a toddler in a 1973 Broadway revival of A Streetcar Named Desire, in which her mother played Blanche DuBois. She spent her childhood in the UK and the US, attending several schools, including Interlochen Arts Academy. She was mainly raised in Asheville, North Carolina. Her drama training was split between the North Carolina School of the Arts and the Central School of Speech and Drama in London.

Ehle made her professional debut as Calypso in The Camomile Lawn (released in 1992), a television adaptation of Mary Wesley's book of the same name, in which she and her mother played the same character at different ages. The director, Peter Hall, then cast her as Elmire in his 1991 production of Tartuffe, for which she won second prize at the Ian Charleson Awards.

One of Ehle's first notable roles was as Elizabeth Bennet in the BBC 1995 television adaptation of Jane Austen's Pride and Prejudice co-starring Colin Firth, for which she won the British Academy Television Award for Best Actress. The same year, she joined the Royal Shakespeare Company, and gained her first major feature film role in Paradise Road (1997). She also appeared in supporting roles in Brian Gilbert's Wilde (1997) and István Szabó's Sunshine (1999).

In 2000, Ehle made her Broadway debut as Annie in Tom Stoppard's The Real Thing, winning the Tony Award for Best Performance by a Leading Actress in a Play. That following year, Ehle appeared again on Broadway in the revival of Noël Coward's Design for Living co-starring with Dominic West and Alan Cumming.

After a hiatus, Ehle returned to the London stage in 2005 in The Philadelphia Story at the Old Vic opposite Kevin Spacey. The following year, she played Lady Macbeth in Macbeth with Liev Schreiber, as part of the Shakespeare in the Park.