Benjamin Mark Lasker Wallfisch (born 7 August 1979) is a British composer, conductor and producer, known for his work on film scores. He has contributed to over 50 feature films since the mid-2000s, including notable works like Blade Runner 2049, Shazam!, It, It Chapter Two, The Invisible Man, Hidden Figures, A Cure for Wellness, The Flash, Twisters, Alien: Romulus, and Kraven the Hunter.

His work has earned recognition including a joint nomination with Pharrell Williams and Hans Zimmer for Best Original Score at the 74th Golden Globe Awards for Hidden Figures, as well as nominations for the BAFTA Award for Best Film Music and the Grammy Award for Best Score Soundtrack for Visual Media for Blade Runner 2049. In 2020, Wallfisch was nominated for Film Composer of the Year for the second consecutive year at the World Soundtrack Awards.

Wallfisch's film compositions have contributed to movies with a combined worldwide box office revenue of over $2.5 billion. In 2019, Variety acknowledged his achievements by including him in their Billion Dollar Composer series.