Will Castle (portrayed by Marcus Johns) was a minor character from the 2004 anti-hero film The Punisher. He was the son of Frank and Maria Castle, though unlike his parents his character is exclusive to the film and he has no comic book counterpart.
After his father completes his last mission with the FBI, Will joins his parents in attending a family reunion in Puerto Rico where they celebrate Frank's retirement and imminent move to London. However, the reunion soon turns into a massacre when an army of triggermen sent by crime lord Howard Saint arrives to take revenge against Frank for killing Howard's son Bobby. The gangsters are under orders to kill Frank's entire family and start gunning down everyone at the reunion. Maria manages to escape from the cabin with Will, but the pair are pursued across a boardwalk by several gangsters driving an SUV. Unable to outrun their pursuers, Maria and Will are both run over.