Benjamin Géza Affleck-Boldt (born August 15, 1972), better known as Ben Affleck, is an American actor, film director, writer, and producer. He became known with his performances in Kevin Smith's films such as Mallrats (1995), Chasing Amy (1997), and Dogma (1999). Affleck won an Academy Award and a Golden Globe Award for the screenplay for Good Will Hunting (1997), which he co-wrote with Matt Damon, and has appeared in lead roles in such popular hits as Armageddon (1998), Pearl Harbor (2001), Changing Lanes (2002), The Sum of All Fears(2002), Daredevil (2003), Hollywoodland (2007) and State of Play (2009).

Affleck is a critically acclaimed filmmaker. He directed Gone Baby Gone (2007) and The Town (2010), playing the lead in the latter. He has worked with his younger brother, actor Casey Affleck, on several projects, including Good Will Hunting and Gone Baby Gone.

Affleck has been married to Jennifer Garner since June 2005. They have two daughters, Violet and Seraphina, and a son, Samuel. Previously, he dated Gwyneth Paltrow in 1998, and his relationship with actress/singer Jennifer Lopez attracted worldwide media attention, in which Affleck and Lopez were dubbed "Bennifer", ended in 2004.

Affleck has been actively involved in politics and charitable causes. He and Matt Damon also founded the production company LivePlanet.