Kate Elizabeth Winslet, CBE (born 5 October 1975), is an English actress. She is the recipient of an Academy Award, three BAFTA Awards, a BIFA Award, four Golden Globe Awards, a Grammy Award, a Primetime Emmy Award, an AACTA Award, and three Screen Actors Guild Awards. Winslet is the youngest person to receive six Academy Award nominations, with seven nominations in total, and is one of the few actresses to win three of the four major American entertainment awards (EGOT). In addition, she has won awards from the Australian Academy of Cinema and Television Arts and European Film Academy, among others, and the Honorary César Award in 2012.

Brought up in Berkshire, Winslet studied drama from childhood and began her career in British television in 1991. She made her film debut in Heavenly Creatures (1994), for which she received praise. She garnered recognition for her supporting role in Sense and Sensibility (1995) before achieving global stardom with the epic romance Titanic (1997), which was the highest-grossing film of all time at that point. Winslet's performances in Iris (2001), Eternal Sunshine of the Spotless Mind (2004), Finding Neverland (2004), Little Children (2006), Revolutionary Road (2008), The Dressmaker (2015) and Steve Jobs (2015) continued to draw praise from film critics. In 2008, film critic David Edelstein described her as "the best English-speaking film actress of her generation".

Winslet won the Academy Award for Best Actress for her role in The Reader (2008) and the Primetime Emmy Award for Outstanding Lead Actress in a Miniseries or Movie for playing the title role in the HBO miniseries Mildred Pierce (2011). Winslet's greatest commercial successes since Titanic include the romantic comedy The Holiday (2006), the animated film Flushed Away (2006), and the first two films of The Divergent Series.

In addition to acting, Winslet has narrated documentaries and children's books. She was awarded the Grammy Award for Best Spoken Word Album for Children in 2000 for narrating Listen to the Storyteller. She has also provided her vocals to soundtracks of her films, including the single "What If" from Christmas Carol: The Movie (2001). Divorced from two film directors, Jim Threapleton and Sam Mendes, Winslet is currently married to businessman Ned Rocknroll.