Caleb Casey McGuire Affleck-Boldt (born August 12, 1975), is an American actor and film director. Throughout the 1990s and early 2000s, he played supporting roles in mainstream hits like Good Will Hunting (1997) and Ocean's Eleven (2001) as well as in critically acclaimed independent films such as Chasing Amy (1997). He is the younger brother of actor and director Ben Affleck, with whom he has frequently collaborated professionally. In 2007, his breakout year, Affleck gained recognition and critical acclaim for his work in Gone Baby Gone and The Assassination of Jesse James by the Coward Robert Ford, for which he received an Academy Award nomination for Best Supporting Actor. He also received critical acclaim for his performance in Out of the Furnace (2013).