Eloise Mumford (born September 24, 1986, Olympia, Washington) is an American actress, the middle child of parents Tom Mumford and Nancy Smith, who was home-schooled through fifth grade before attending Capital High School in Olympia. Inspired at age seven by a local production of South Pacific, she performed in high school plays and at Olympia's Capital Playhouse before graduating from New York University's Tisch School of the Arts in 2009, where she also studied at the Atlantic Acting School and understudied Elisabeth Moss in the Broadway revival of Speed the Plow. While in college she starred with Jesse Eisenberg in the short film Some Boys Don't Leave. She has been active since 2008 and is best known for portraying Kate Kavanagh in the Fifty Shades of Grey film trilogy and for her television roles on Lone Star, The River, The Right Stuff, and Cross. Her notable film credits include So Undercover (2012) (Miley Cyrus, Chris Evans), Drones (2013) (Matt O'Leary, Keri Russell), Fifty Shades of Grey (2015) (Dakota Johnson, Jamie Dornan), Fifty Shades Darker (2017) (Dakota Johnson, Jamie Dornan), Fifty Shades Freed (2018) (Dakota Johnson, Jamie Dornan), and Standing Up, Falling Down (2019) (Billy Crystal, Ben Schwartz). On television she has appeared in Lone Star (2010), The River (2012), Chicago Fire (2017–2019), The Right Stuff (2020) (Patrick Wilson, Calum Witty), Cross (2024–2026) (Aldis Hodge, James Badge Dale), and the Hallmark films The Baker's Son (2021), The Presence of Love (2022), Sweeter Than Chocolate (2023), and Villa Amore (2025).