Kathrin Romary Beckinsale (born 26 July 1973) is an English actress. After some minor television roles, she made her film debut in Much Ado About Nothing (1993) while still a student at the University of Oxford. She appeared in British costume dramas such as Prince of Jutland (1994), Cold Comfort Farm (1995), Emma (1996), and The Golden Bowl (2000), in addition to various stage and radio productions. She began to seek film work in the United States in the late 1990s and, after appearing in small-scale dramas The Last Days of Disco (1998) and Brokedown Palace (1999), she had starring roles in the war drama Pearl Harbor (2001) and the romantic comedy Serendipity. She followed those with appearances in The Aviator (2004) and Click (2006).

Since being cast as Selene in the Underworld film series (2003–present), Beckinsale has become known primarily for her work in action films, including Van Helsing (2004), Whiteout (2009), Contraband (2012), and Total Recall (2012). She also continues to make appearances in smaller dramatic projects such as Snow Angels (2007), Nothing but the Truth (2008), and Everybody's Fine (2009). In 2016, she appeared in the critically acclaimed Love & Friendship, for which her performance received worldwide praise.