Jessie Buckley (born 28 December 1989) is an Irish actress and singer. The recipient of a Laurence Olivier Award, in addition to nominations for an Academy Award and three BAFTA Awards, she was listed at number 38 on The Irish Times' list of Ireland's greatest film actors of all time, in 2020. In 2019, she was recognised by Forbes in its annual 30 Under 30 list.

A RADA graduate, Buckley began her career in 2008 as a contestant on the BBC TV talent show I'd Do Anything, in which she came second. Her early onscreen appearances were in BBC television series, such War & Peace (2016) and Taboo (2017). Buckley made her film debut playing the lead role in Beast (2017), and had her breakthrough starring in the musical film Wild Rose (2018). Her performance as an aspiring country music singer in the latter earned her a nomination for the BAFTA Award for Best Actress in a Leading Role.

Buckley's career progressed with starring roles in the HBO miniseries Chernobyl (2019), the thriller film I'm Thinking of Ending Things (2020), season four of Fargo (2020), and the drama The Lost Daughter (2021). Her performance as a troubled mother in the latter earned her nominations for the BAFTA and Academy Award for Best Supporting Actress. Buckley's portrayal of Sally Bowles in a 2021 West End theatre revival of Cabaret won her the Laurence Olivier Award for Best Actress in a Musical. In 2022, she released the collaborate album For All Our Days That Tear the Heart with Bernard Butler, and starred in the drama Women Talking.